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Spigot Error

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Nov 13th, 2018
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  1. [23:27:46] [Spigot Watchdog Thread/ERROR]: The server has stopped responding!
  2. [23:27:46] [Spigot Watchdog Thread/ERROR]: Please report this to http://www.spigotmc.org/
  3. [23:27:46] [Spigot Watchdog Thread/ERROR]: Be sure to include ALL relevant console errors and Minecraft crash reports
  4. [23:27:46] [Spigot Watchdog Thread/ERROR]: Spigot version: git-Spigot-dcd1643-e60fc34 (MC: 1.12.2)
  5. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  6. [23:27:46] [Spigot Watchdog Thread/ERROR]: Server thread dump (Look for plugins here before reporting to Spigot!):
  7. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  8. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: Server thread
  9. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 15 | Suspended: false | Native: false | State: RUNNABLE
  10. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  11. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.DataPaletteLinear.a(SourceFile:23)
  12. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.DataPaletteBlock.setBlockIndex(DataPaletteBlock.java:61)
  13. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.DataPaletteBlock.setBlock(DataPaletteBlock.java:57)
  14. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.ChunkSection.setType(ChunkSection.java:63)
  15. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.Chunk.<init>(Chunk.java:124)
  16. [23:27:46] [Spigot Watchdog Thread/ERROR]: minelazz.iIiIIiIIII.L(gc:110)
  17. [23:27:46] [Spigot Watchdog Thread/ERROR]: minelazz.iIiIIiIIII.getOrCreateChunk(gc:289)
  18. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.ChunkProviderServer.originalGetChunkAt(ChunkProviderServer.java:160)
  19. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:140)
  20. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:120)
  21. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:116)
  22. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.v1_12_R1.CraftServer.createWorld(CraftServer.java:945)
  23. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.Bukkit.createWorld(Bukkit.java:454)
  24. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.WorldCreator.createWorld(WorldCreator.java:261)
  25. [23:27:46] [Spigot Watchdog Thread/ERROR]: com.onarandombox.MultiverseCore.utils.WorldManager.doLoad(WorldManager.java:466)
  26. [23:27:46] [Spigot Watchdog Thread/ERROR]: com.onarandombox.MultiverseCore.utils.WorldManager.addWorld(WorldManager.java:268)
  27. [23:27:46] [Spigot Watchdog Thread/ERROR]: com.onarandombox.MultiverseCore.commands.ImportCommand.runCommand(ImportCommand.java:147)
  28. [23:27:46] [Spigot Watchdog Thread/ERROR]: com.pneumaticraft.commandhandler.multiverse.CommandHandler.checkAndRunCommand(CommandHandler.java:279)
  29. [23:27:46] [Spigot Watchdog Thread/ERROR]: com.pneumaticraft.commandhandler.multiverse.CommandHandler.processFoundCommands(CommandHandler.java:143)
  30. [23:27:46] [Spigot Watchdog Thread/ERROR]: com.pneumaticraft.commandhandler.multiverse.CommandHandler.locateAndRunCommand(CommandHandler.java:93)
  31. [23:27:46] [Spigot Watchdog Thread/ERROR]: com.onarandombox.MultiverseCore.MultiverseCore.onCommand(MultiverseCore.java:916)
  32. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
  33. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141)
  34. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:648)
  35. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.Bukkit.dispatchCommand(Bukkit.java:574)
  36. [23:27:46] [Spigot Watchdog Thread/ERROR]: com.minelazz.epicworldgenerator.iIiIiiiIii.run(yh:337)
  37. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:76)
  38. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:361)
  39. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:739)
  40. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406)
  41. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679)
  42. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577)
  43. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Thread.run(Unknown Source)
  44. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  45. [23:27:46] [Spigot Watchdog Thread/ERROR]: Entire Thread Dump:
  46. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  47. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: Chunk I/O Executor Thread-1
  48. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 43 | Suspended: false | Native: false | State: WAITING
  49. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  50. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.misc.Unsafe.park(Native Method)
  51. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.concurrent.locks.LockSupport.park(Unknown Source)
  52. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
  53. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.concurrent.LinkedBlockingQueue.take(Unknown Source)
  54. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
  55. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
  56. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
  57. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Thread.run(Unknown Source)
  58. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  59. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: Netty Server IO #1
  60. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 41 | Suspended: false | Native: true | State: RUNNABLE
  61. [23:27:46] [Spigot Watchdog Thread/ERROR]: Thread is waiting on monitor(s):
  62. [23:27:46] [Spigot Watchdog Thread/ERROR]: Locked on:sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)
  63. [23:27:46] [Spigot Watchdog Thread/ERROR]: Locked on:sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)
  64. [23:27:46] [Spigot Watchdog Thread/ERROR]: Locked on:sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)
  65. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  66. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method)
  67. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.nio.ch.WindowsSelectorImpl$SubSelector.poll(Unknown Source)
  68. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.nio.ch.WindowsSelectorImpl$SubSelector.access$400(Unknown Source)
  69. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.nio.ch.WindowsSelectorImpl.doSelect(Unknown Source)
  70. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)
  71. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.nio.ch.SelectorImpl.select(Unknown Source)
  72. [23:27:46] [Spigot Watchdog Thread/ERROR]: io.netty.channel.nio.SelectedSelectionKeySetSelector.select(SelectedSelectionKeySetSelector.java:62)
  73. [23:27:46] [Spigot Watchdog Thread/ERROR]: io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:753)
  74. [23:27:46] [Spigot Watchdog Thread/ERROR]: io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:409)
  75. [23:27:46] [Spigot Watchdog Thread/ERROR]: io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884)
  76. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Thread.run(Unknown Source)
  77. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  78. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: File IO Thread
  79. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 36 | Suspended: false | Native: false | State: TIMED_WAITING
  80. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  81. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Thread.sleep(Native Method)
  82. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.FileIOThread.c(SourceFile:51)
  83. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.FileIOThread.run(SourceFile:30)
  84. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Thread.run(Unknown Source)
  85. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  86. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: Timer-1
  87. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 35 | Suspended: false | Native: false | State: TIMED_WAITING
  88. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  89. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Object.wait(Native Method)
  90. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.TimerThread.mainLoop(Unknown Source)
  91. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.TimerThread.run(Unknown Source)
  92. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  93. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: Timer-0
  94. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 29 | Suspended: false | Native: false | State: WAITING
  95. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  96. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Object.wait(Native Method)
  97. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Object.wait(Unknown Source)
  98. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.TimerThread.mainLoop(Unknown Source)
  99. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.TimerThread.run(Unknown Source)
  100. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  101. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: pool-4-thread-1
  102. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 24 | Suspended: false | Native: false | State: TIMED_WAITING
  103. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  104. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.misc.Unsafe.park(Native Method)
  105. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source)
  106. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(Unknown Source)
  107. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(Unknown Source)
  108. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(Unknown Source)
  109. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source)
  110. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
  111. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
  112. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Thread.run(Unknown Source)
  113. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  114. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: Netty Server IO #0
  115. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 23 | Suspended: false | Native: true | State: RUNNABLE
  116. [23:27:46] [Spigot Watchdog Thread/ERROR]: Thread is waiting on monitor(s):
  117. [23:27:46] [Spigot Watchdog Thread/ERROR]: Locked on:sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)
  118. [23:27:46] [Spigot Watchdog Thread/ERROR]: Locked on:sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)
  119. [23:27:46] [Spigot Watchdog Thread/ERROR]: Locked on:sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)
  120. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  121. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method)
  122. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.nio.ch.WindowsSelectorImpl$SubSelector.poll(Unknown Source)
  123. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.nio.ch.WindowsSelectorImpl$SubSelector.access$400(Unknown Source)
  124. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.nio.ch.WindowsSelectorImpl.doSelect(Unknown Source)
  125. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)
  126. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.nio.ch.SelectorImpl.select(Unknown Source)
  127. [23:27:46] [Spigot Watchdog Thread/ERROR]: io.netty.channel.nio.SelectedSelectionKeySetSelector.select(SelectedSelectionKeySetSelector.java:62)
  128. [23:27:46] [Spigot Watchdog Thread/ERROR]: io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:753)
  129. [23:27:46] [Spigot Watchdog Thread/ERROR]: io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:409)
  130. [23:27:46] [Spigot Watchdog Thread/ERROR]: io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884)
  131. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Thread.run(Unknown Source)
  132. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  133. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: ObjectCleanerThread
  134. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 22 | Suspended: false | Native: false | State: TIMED_WAITING
  135. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  136. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Object.wait(Native Method)
  137. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.ref.ReferenceQueue.remove(Unknown Source)
  138. [23:27:46] [Spigot Watchdog Thread/ERROR]: io.netty.util.internal.ObjectCleaner$1.run(ObjectCleaner.java:54)
  139. [23:27:46] [Spigot Watchdog Thread/ERROR]: io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
  140. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Thread.run(Unknown Source)
  141. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  142. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: Spigot Metrics Thread
  143. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 21 | Suspended: false | Native: false | State: TIMED_WAITING
  144. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  145. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Object.wait(Native Method)
  146. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.TimerThread.mainLoop(Unknown Source)
  147. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.TimerThread.run(Unknown Source)
  148. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  149. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: Spigot Watchdog Thread
  150. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 20 | Suspended: false | Native: false | State: RUNNABLE
  151. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  152. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.management.ThreadImpl.dumpThreads0(Native Method)
  153. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.management.ThreadImpl.dumpAllThreads(Unknown Source)
  154. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.spigotmc.WatchdogThread.run(WatchdogThread.java:76)
  155. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  156. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: Server console handler
  157. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 18 | Suspended: false | Native: true | State: RUNNABLE
  158. [23:27:46] [Spigot Watchdog Thread/ERROR]: Thread is waiting on monitor(s):
  159. [23:27:46] [Spigot Watchdog Thread/ERROR]: Locked on:org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:169)
  160. [23:27:46] [Spigot Watchdog Thread/ERROR]: Locked on:org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:261)
  161. [23:27:46] [Spigot Watchdog Thread/ERROR]: Locked on:org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:198)
  162. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  163. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.fusesource.jansi.internal.Kernel32.ReadConsoleInputW(Native Method)
  164. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.fusesource.jansi.internal.Kernel32.readConsoleInputHelper(Kernel32.java:761)
  165. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.fusesource.jansi.internal.Kernel32.readConsoleKeyInput(Kernel32.java:794)
  166. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.fusesource.jansi.internal.WindowsSupport.readConsoleInput(WindowsSupport.java:97)
  167. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.libs.jline.WindowsTerminal.readConsoleInput(WindowsTerminal.java:215)
  168. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.libs.jline.WindowsTerminal.access$000(WindowsTerminal.java:55)
  169. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.libs.jline.WindowsTerminal$1.read(WindowsTerminal.java:157)
  170. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:169)
  171. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:137)
  172. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:246)
  173. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:261)
  174. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:198)
  175. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.readCharacter(ConsoleReader.java:2145)
  176. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.readLine(ConsoleReader.java:2349)
  177. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.DedicatedServer$2.run(DedicatedServer.java:85)
  178. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  179. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: Thread-4
  180. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 19 | Suspended: false | Native: false | State: RUNNABLE
  181. [23:27:46] [Spigot Watchdog Thread/ERROR]: Thread is waiting on monitor(s):
  182. [23:27:46] [Spigot Watchdog Thread/ERROR]: Locked on:sun.nio.cs.StreamEncoder.flush(Unknown Source)
  183. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  184. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.fusesource.jansi.internal.Kernel32.FillConsoleOutputCharacterW(Native Method)
  185. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.fusesource.jansi.WindowsAnsiOutputStream.processEraseLine(WindowsAnsiOutputStream.java:173)
  186. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.fusesource.jansi.AnsiOutputStream.processEscapeCommand(AnsiOutputStream.java:253)
  187. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.fusesource.jansi.AnsiOutputStream.write(AnsiOutputStream.java:125)
  188. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.io.FilterOutputStream.write(Unknown Source)
  189. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.nio.cs.StreamEncoder.writeBytes(Unknown Source)
  190. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.nio.cs.StreamEncoder.implFlushBuffer(Unknown Source)
  191. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.nio.cs.StreamEncoder.implFlush(Unknown Source)
  192. [23:27:46] [Spigot Watchdog Thread/ERROR]: sun.nio.cs.StreamEncoder.flush(Unknown Source)
  193. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.io.OutputStreamWriter.flush(Unknown Source)
  194. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.flush(ConsoleReader.java:976)
  195. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.v1_12_R1.util.TerminalConsoleWriterThread.run(TerminalConsoleWriterThread.java:35)
  196. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Thread.run(Unknown Source)
  197. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  198. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: DestroyJavaVM
  199. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 17 | Suspended: false | Native: false | State: RUNNABLE
  200. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  201. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  202. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: Server thread
  203. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 15 | Suspended: false | Native: false | State: RUNNABLE
  204. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  205. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.World.c(World.java:2293)
  206. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.Chunk.a(Chunk.java:284)
  207. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.Chunk.b(Chunk.java:274)
  208. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.Chunk.h(Chunk.java:248)
  209. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.Chunk.z(Chunk.java:1206)
  210. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.Chunk.o(Chunk.java:1192)
  211. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.Chunk.a(Chunk.java:963)
  212. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.Chunk.loadNearby(Chunk.java:950)
  213. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.ChunkProviderServer.originalGetChunkAt(ChunkProviderServer.java:173)
  214. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:140)
  215. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:120)
  216. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:116)
  217. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.v1_12_R1.CraftServer.createWorld(CraftServer.java:945)
  218. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.Bukkit.createWorld(Bukkit.java:454)
  219. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.WorldCreator.createWorld(WorldCreator.java:261)
  220. [23:27:46] [Spigot Watchdog Thread/ERROR]: com.onarandombox.MultiverseCore.utils.WorldManager.doLoad(WorldManager.java:466)
  221. [23:27:46] [Spigot Watchdog Thread/ERROR]: com.onarandombox.MultiverseCore.utils.WorldManager.addWorld(WorldManager.java:268)
  222. [23:27:46] [Spigot Watchdog Thread/ERROR]: com.onarandombox.MultiverseCore.commands.ImportCommand.runCommand(ImportCommand.java:147)
  223. [23:27:46] [Spigot Watchdog Thread/ERROR]: com.pneumaticraft.commandhandler.multiverse.CommandHandler.checkAndRunCommand(CommandHandler.java:279)
  224. [23:27:46] [Spigot Watchdog Thread/ERROR]: com.pneumaticraft.commandhandler.multiverse.CommandHandler.processFoundCommands(CommandHandler.java:143)
  225. [23:27:46] [Spigot Watchdog Thread/ERROR]: com.pneumaticraft.commandhandler.multiverse.CommandHandler.locateAndRunCommand(CommandHandler.java:93)
  226. [23:27:46] [Spigot Watchdog Thread/ERROR]: com.onarandombox.MultiverseCore.MultiverseCore.onCommand(MultiverseCore.java:916)
  227. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
  228. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141)
  229. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.v1_12_R1.CraftServer.dispatchCommand(CraftServer.java:648)
  230. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.Bukkit.dispatchCommand(Bukkit.java:574)
  231. [23:27:46] [Spigot Watchdog Thread/ERROR]: com.minelazz.epicworldgenerator.iIiIiiiIii.run(yh:337)
  232. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftTask.run(CraftTask.java:76)
  233. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.v1_12_R1.scheduler.CraftScheduler.mainThreadHeartbeat(CraftScheduler.java:361)
  234. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.MinecraftServer.D(MinecraftServer.java:739)
  235. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.DedicatedServer.D(DedicatedServer.java:406)
  236. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.MinecraftServer.C(MinecraftServer.java:679)
  237. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.MinecraftServer.run(MinecraftServer.java:577)
  238. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Thread.run(Unknown Source)
  239. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  240. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: Server Infinisleeper
  241. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 16 | Suspended: false | Native: false | State: TIMED_WAITING
  242. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  243. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Thread.sleep(Native Method)
  244. [23:27:46] [Spigot Watchdog Thread/ERROR]: net.minecraft.server.v1_12_R1.DedicatedServer$1.run(DedicatedServer.java:60)
  245. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  246. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: NonBlockingInputStreamThread
  247. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 13 | Suspended: false | Native: false | State: WAITING
  248. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  249. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Object.wait(Native Method)
  250. [23:27:46] [Spigot Watchdog Thread/ERROR]: org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.run(NonBlockingInputStream.java:278)
  251. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Thread.run(Unknown Source)
  252. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  253. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: Snooper Timer
  254. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 11 | Suspended: false | Native: false | State: TIMED_WAITING
  255. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  256. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Object.wait(Native Method)
  257. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.TimerThread.mainLoop(Unknown Source)
  258. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.util.TimerThread.run(Unknown Source)
  259. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  260. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: Attach Listener
  261. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 5 | Suspended: false | Native: false | State: RUNNABLE
  262. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  263. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  264. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: Signal Dispatcher
  265. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 4 | Suspended: false | Native: false | State: RUNNABLE
  266. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  267. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  268. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: Finalizer
  269. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 3 | Suspended: false | Native: false | State: WAITING
  270. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  271. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Object.wait(Native Method)
  272. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.ref.ReferenceQueue.remove(Unknown Source)
  273. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.ref.ReferenceQueue.remove(Unknown Source)
  274. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.ref.Finalizer$FinalizerThread.run(Unknown Source)
  275. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  276. [23:27:46] [Spigot Watchdog Thread/ERROR]: Current Thread: Reference Handler
  277. [23:27:46] [Spigot Watchdog Thread/ERROR]: PID: 2 | Suspended: false | Native: false | State: WAITING
  278. [23:27:46] [Spigot Watchdog Thread/ERROR]: Stack:
  279. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Object.wait(Native Method)
  280. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.Object.wait(Unknown Source)
  281. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.ref.Reference.tryHandlePending(Unknown Source)
  282. [23:27:46] [Spigot Watchdog Thread/ERROR]: java.lang.ref.Reference$ReferenceHandler.run(Unknown Source)
  283. [23:27:46] [Spigot Watchdog Thread/ERROR]: ------------------------------
  284. [23:27:46] [Spigot Watchdog Thread/INFO]: Startup script './start.sh' does not exist! Stopping server.
  285. [23:27:46] [Spigot Watchdog Thread/INFO]: Stopping server
  286. [23:27:46] [Spigot Watchdog Thread/INFO]: [VoxelSniper] Disabling VoxelSniper v5.172.0-SNAPSHOT
  287. [23:27:46] [Spigot Watchdog Thread/INFO]: [WorldEdit] Disabling WorldEdit v6.1.7;dd00bb1
  288. [23:27:46] [Spigot Watchdog Thread/INFO]: [Multiverse-Core] Disabling Multiverse-Core v2.5-b719
  289. [23:27:46] [Spigot Watchdog Thread/INFO]: [FastAsyncVoxelSniper] Disabling FastAsyncVoxelSniper v18.11.08-ba06684-1230-21.5.17
  290. [23:27:46] [Spigot Watchdog Thread/INFO]: [FastAsyncWorldEdit] Disabling FastAsyncWorldEdit v18.11.08-ba06684-1230-21.5.17
  291. [23:27:46] [Spigot Watchdog Thread/INFO]: [EpicWorldGenerator] Disabling EpicWorldGenerator v8.0.0-SNAPSHOT-4
  292. [23:27:46] [Spigot Watchdog Thread/INFO]: Saving players
  293. [23:27:46] [Spigot Watchdog Thread/INFO]: _MiracleX_ lost connection: Server closed
  294. [23:27:46] [Spigot Watchdog Thread/INFO]: _MiracleX_ left the game
  295. [23:27:46] [Server thread/INFO]: Preparing spawn area for Survival, 93%
  296. [23:27:46] [Spigot Watchdog Thread/INFO]: Saving worlds
  297. [23:27:46] [Spigot Watchdog Thread/INFO]: Saving chunks for level 'Spawn'/overworld
  298. [23:27:46] [Spigot Watchdog Thread/INFO]: Saving chunks for level 'Spawn_nether'/the_nether
  299. [23:27:46] [Spigot Watchdog Thread/INFO]: Saving chunks for level 'Spawn_the_end'/the_end
  300. [23:27:46] [Spigot Watchdog Thread/INFO]: Saving chunks for level 'Survival'/overworld
  301. [23:27:46] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  302. java.util.ConcurrentModificationException: null
  303. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  304. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  305. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  306. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  307. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  308. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  309. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  310. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  311. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  312. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  313. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  314. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  315. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  316. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  317. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  318. [23:27:46] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  319. java.util.ConcurrentModificationException: null
  320. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  321. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  322. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  323. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  324. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  325. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  326. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  327. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  328. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  329. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  330. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  331. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  332. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  333. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  334. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  335. [23:27:47] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  336. java.util.ConcurrentModificationException: null
  337. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  338. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  339. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  340. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  341. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  342. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  343. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  344. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  345. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  346. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  347. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  348. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  349. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  350. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  351. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  352. [23:27:47] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  353. java.util.ConcurrentModificationException: null
  354. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  355. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  356. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  357. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  358. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  359. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  360. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  361. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  362. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  363. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  364. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  365. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  366. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  367. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  368. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  369. [23:27:47] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  370. java.util.ConcurrentModificationException: null
  371. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  372. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  373. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  374. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  375. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  376. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  377. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  378. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  379. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  380. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  381. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  382. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  383. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  384. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  385. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  386. [23:27:47] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  387. java.util.ConcurrentModificationException: null
  388. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  389. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  390. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  391. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  392. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  393. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  394. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  395. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  396. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  397. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  398. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  399. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  400. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  401. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  402. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  403. [23:27:47] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  404. java.util.ConcurrentModificationException: null
  405. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  406. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  407. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  408. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  409. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  410. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  411. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  412. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  413. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  414. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  415. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  416. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  417. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  418. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  419. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  420. [23:27:47] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  421. java.util.ConcurrentModificationException: null
  422. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  423. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  424. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  425. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  426. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  427. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  428. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  429. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  430. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  431. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  432. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  433. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  434. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  435. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  436. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  437. [23:27:47] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  438. java.util.ConcurrentModificationException: null
  439. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  440. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  441. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  442. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  443. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  444. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  445. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  446. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  447. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  448. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  449. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  450. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  451. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  452. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  453. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  454. [23:27:47] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  455. java.util.ConcurrentModificationException: null
  456. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  457. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  458. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  459. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  460. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  461. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  462. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  463. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  464. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  465. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  466. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  467. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  468. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  469. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  470. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  471. [23:27:47] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  472. java.util.ConcurrentModificationException: null
  473. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  474. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  475. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  476. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  477. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  478. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  479. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  480. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  481. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  482. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  483. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  484. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  485. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  486. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  487. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  488. [23:27:47] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  489. java.util.ConcurrentModificationException: null
  490. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  491. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  492. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  493. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  494. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  495. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  496. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  497. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  498. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  499. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  500. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  501. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  502. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  503. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  504. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  505. [23:27:47] [Server thread/INFO]: Preparing spawn area for Survival, 93%
  506. [23:27:48] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  507. java.util.ConcurrentModificationException: null
  508. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  509. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  510. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  511. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  512. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  513. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  514. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  515. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  516. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  517. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  518. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  519. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  520. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  521. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  522. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  523. [23:27:48] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  524. java.util.ConcurrentModificationException: null
  525. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  526. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  527. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  528. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  529. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  530. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  531. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  532. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  533. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  534. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  535. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  536. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  537. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  538. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  539. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  540. [23:27:48] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  541. java.util.ConcurrentModificationException: null
  542. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  543. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  544. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  545. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  546. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  547. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  548. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  549. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  550. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  551. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  552. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  553. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  554. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  555. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  556. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  557. [23:27:48] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  558. java.util.ConcurrentModificationException: null
  559. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  560. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  561. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  562. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  563. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  564. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  565. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  566. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  567. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  568. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  569. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  570. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  571. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  572. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  573. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  574. [23:27:48] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  575. java.util.ConcurrentModificationException: null
  576. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  577. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  578. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  579. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  580. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  581. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  582. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  583. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  584. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  585. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  586. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  587. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  588. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  589. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  590. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  591. [23:27:48] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  592. java.util.ConcurrentModificationException: null
  593. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  594. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  595. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  596. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  597. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  598. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  599. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  600. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  601. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  602. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  603. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  604. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  605. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  606. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  607. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  608. [23:27:48] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  609. java.util.ConcurrentModificationException: null
  610. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  611. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  612. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  613. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  614. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  615. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  616. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  617. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  618. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  619. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  620. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  621. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  622. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  623. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  624. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  625. [23:27:48] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  626. java.util.ConcurrentModificationException: null
  627. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  628. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  629. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  630. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  631. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  632. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  633. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  634. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  635. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  636. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  637. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  638. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  639. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  640. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  641. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  642. [23:27:49] [Server thread/INFO]: Preparing spawn area for Survival, 93%
  643. [23:27:49] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  644. java.util.ConcurrentModificationException: null
  645. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  646. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  647. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  648. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  649. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  650. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  651. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  652. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  653. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  654. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  655. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  656. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  657. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  658. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  659. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  660. [23:27:49] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  661. java.util.ConcurrentModificationException: null
  662. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  663. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  664. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  665. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  666. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  667. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  668. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  669. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  670. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  671. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  672. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  673. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  674. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  675. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  676. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  677. [23:27:49] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  678. java.util.ConcurrentModificationException: null
  679. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  680. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  681. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  682. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  683. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  684. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  685. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  686. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  687. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  688. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  689. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  690. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  691. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  692. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  693. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  694. [23:27:49] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  695. java.util.ConcurrentModificationException: null
  696. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  697. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  698. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  699. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  700. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  701. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  702. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  703. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  704. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  705. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  706. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  707. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  708. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  709. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  710. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  711. [23:27:49] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  712. java.util.ConcurrentModificationException: null
  713. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  714. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  715. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  716. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  717. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  718. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  719. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  720. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  721. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  722. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  723. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  724. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  725. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  726. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  727. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  728. [23:27:49] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  729. java.util.ConcurrentModificationException: null
  730. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  731. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  732. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  733. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  734. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  735. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  736. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  737. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  738. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  739. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  740. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  741. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  742. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  743. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  744. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  745. [23:27:49] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  746. java.util.ConcurrentModificationException: null
  747. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  748. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  749. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  750. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  751. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  752. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  753. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  754. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  755. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  756. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  757. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  758. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  759. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  760. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  761. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  762. [23:27:50] [Server thread/INFO]: Preparing spawn area for Survival, 97%
  763. [23:27:50] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  764. java.util.ConcurrentModificationException: null
  765. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  766. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  767. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  768. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  769. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  770. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  771. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  772. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  773. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  774. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  775. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  776. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  777. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  778. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  779. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  780. [23:27:50] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  781. java.util.ConcurrentModificationException: null
  782. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  783. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  784. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  785. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  786. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  787. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  788. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  789. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  790. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  791. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  792. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  793. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  794. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  795. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  796. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  797. [23:27:50] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  798. java.util.ConcurrentModificationException: null
  799. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  800. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  801. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  802. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  803. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  804. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  805. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  806. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  807. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  808. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  809. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  810. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  811. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  812. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  813. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  814. [23:27:50] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  815. java.util.ConcurrentModificationException: null
  816. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  817. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  818. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  819. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  820. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  821. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  822. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  823. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  824. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  825. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  826. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  827. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  828. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  829. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  830. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  831. [23:27:50] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  832. java.util.ConcurrentModificationException: null
  833. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  834. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  835. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  836. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  837. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  838. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  839. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  840. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  841. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  842. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  843. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  844. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  845. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  846. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  847. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  848. [23:27:51] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  849. java.util.ConcurrentModificationException: null
  850. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  851. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  852. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  853. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  854. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  855. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  856. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  857. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  858. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  859. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  860. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  861. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  862. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  863. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  864. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  865. [23:27:51] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  866. java.util.ConcurrentModificationException: null
  867. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  868. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  869. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  870. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  871. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  872. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  873. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  874. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  875. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  876. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  877. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  878. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  879. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  880. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  881. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  882. [23:27:51] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  883. java.util.ConcurrentModificationException: null
  884. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  885. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  886. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  887. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  888. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  889. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  890. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  891. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  892. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  893. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  894. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  895. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  896. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  897. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  898. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  899. [23:27:51] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  900. java.util.ConcurrentModificationException: null
  901. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  902. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  903. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  904. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  905. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  906. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  907. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  908. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  909. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  910. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  911. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  912. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  913. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  914. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  915. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  916. [23:27:51] [Server thread/INFO]: Preparing spawn area for Survival, 97%
  917. [23:27:51] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  918. java.util.ConcurrentModificationException: null
  919. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  920. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  921. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  922. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  923. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  924. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  925. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  926. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  927. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  928. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  929. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  930. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  931. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  932. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  933. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  934. [23:27:51] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  935. java.util.ConcurrentModificationException: null
  936. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  937. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  938. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  939. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  940. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  941. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  942. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  943. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  944. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  945. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  946. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  947. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  948. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  949. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  950. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  951. [23:27:51] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  952. java.util.ConcurrentModificationException: null
  953. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  954. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  955. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  956. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  957. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  958. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  959. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  960. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  961. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  962. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  963. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  964. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  965. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  966. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  967. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  968. [23:27:51] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  969. java.util.ConcurrentModificationException: null
  970. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  971. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  972. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  973. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  974. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  975. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  976. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  977. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  978. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  979. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  980. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  981. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  982. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  983. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  984. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  985. [23:27:51] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  986. java.util.ConcurrentModificationException: null
  987. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  988. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  989. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  990. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  991. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  992. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  993. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  994. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  995. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  996. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  997. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  998. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  999. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1000. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1001. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1002. [23:27:51] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1003. java.util.ConcurrentModificationException: null
  1004. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1005. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1006. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1007. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1008. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1009. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1010. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1011. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1012. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1013. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1014. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1015. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1016. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1017. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1018. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1019. [23:27:52] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1020. java.util.ConcurrentModificationException: null
  1021. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1022. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1023. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1024. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1025. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1026. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1027. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1028. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1029. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1030. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1031. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1032. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1033. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1034. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1035. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1036. [23:27:52] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1037. java.util.ConcurrentModificationException: null
  1038. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1039. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1040. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1041. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1042. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1043. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1044. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1045. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1046. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1047. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1048. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1049. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1050. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1051. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1052. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1053. [23:27:52] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1054. java.util.ConcurrentModificationException: null
  1055. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1056. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1057. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1058. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1059. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1060. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1061. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1062. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1063. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1064. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1065. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1066. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1067. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1068. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1069. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1070. [23:27:52] [Server thread/INFO]: Preparing spawn area for Survival, 97%
  1071. [23:27:52] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1072. java.util.ConcurrentModificationException: null
  1073. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1074. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1075. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1076. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1077. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1078. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1079. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1080. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1081. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1082. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1083. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1084. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1085. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1086. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1087. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1088. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1089. java.util.ConcurrentModificationException: null
  1090. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1091. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1092. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1093. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1094. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1095. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1096. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1097. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1098. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1099. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1100. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1101. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1102. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1103. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1104. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1105. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1106. java.util.ConcurrentModificationException: null
  1107. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1108. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1109. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1110. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1111. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1112. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1113. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1114. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1115. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1116. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1117. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1118. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1119. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1120. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1121. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1122. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1123. java.util.ConcurrentModificationException: null
  1124. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1125. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1126. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1127. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1128. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1129. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1130. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1131. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1132. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1133. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1134. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1135. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1136. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1137. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1138. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1139. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1140. java.util.ConcurrentModificationException: null
  1141. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1142. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1143. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1144. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1145. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1146. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1147. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1148. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1149. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1150. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1151. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1152. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1153. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1154. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1155. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1156. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1157. java.util.ConcurrentModificationException: null
  1158. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1159. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1160. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1161. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1162. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1163. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1164. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1165. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1166. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1167. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1168. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1169. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1170. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1171. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1172. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1173. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1174. java.util.ConcurrentModificationException: null
  1175. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1176. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1177. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1178. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1179. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1180. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1181. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1182. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1183. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1184. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1185. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1186. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1187. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1188. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1189. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1190. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1191. java.util.ConcurrentModificationException: null
  1192. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1193. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1194. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1195. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1196. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1197. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1198. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1199. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1200. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1201. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1202. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1203. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1204. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1205. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1206. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1207. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1208. java.util.ConcurrentModificationException: null
  1209. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1210. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1211. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1212. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1213. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1214. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1215. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1216. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1217. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1218. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1219. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1220. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1221. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1222. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1223. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1224. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1225. java.util.ConcurrentModificationException: null
  1226. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1227. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1228. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1229. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1230. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1231. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1232. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1233. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1234. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1235. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1236. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1237. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1238. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1239. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1240. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1241. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1242. java.util.ConcurrentModificationException: null
  1243. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1244. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1245. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1246. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1247. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1248. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1249. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1250. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1251. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1252. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1253. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1254. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1255. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1256. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1257. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1258. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1259. java.util.ConcurrentModificationException: null
  1260. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1261. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1262. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1263. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1264. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1265. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1266. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1267. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1268. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1269. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1270. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1271. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1272. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1273. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1274. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1275. [23:27:53] [Server thread/INFO]: Preparing spawn area for Survival, 97%
  1276. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1277. java.util.ConcurrentModificationException: null
  1278. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1279. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1280. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1281. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1282. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1283. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1284. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1285. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1286. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1287. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1288. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1289. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1290. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1291. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1292. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1293. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1294. java.util.ConcurrentModificationException: null
  1295. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1296. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1297. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1298. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1299. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1300. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1301. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1302. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1303. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1304. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1305. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1306. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1307. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1308. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1309. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1310. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1311. java.util.ConcurrentModificationException: null
  1312. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1313. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1314. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1315. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1316. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1317. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1318. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1319. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1320. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1321. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1322. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1323. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1324. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1325. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1326. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1327. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1328. java.util.ConcurrentModificationException: null
  1329. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1330. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1331. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1332. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1333. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1334. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1335. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1336. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1337. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1338. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1339. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1340. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1341. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1342. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1343. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1344. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1345. java.util.ConcurrentModificationException: null
  1346. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1347. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1348. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1349. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1350. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1351. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1352. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1353. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1354. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1355. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1356. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1357. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1358. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1359. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1360. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1361. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1362. java.util.ConcurrentModificationException: null
  1363. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1364. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1365. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1366. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1367. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1368. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1369. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1370. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1371. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1372. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1373. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1374. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1375. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1376. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1377. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1378. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1379. java.util.ConcurrentModificationException: null
  1380. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1381. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1382. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1383. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1384. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1385. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1386. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1387. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1388. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1389. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1390. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1391. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1392. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1393. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1394. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1395. [23:27:53] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1396. java.util.ConcurrentModificationException: null
  1397. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1398. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1399. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1400. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1401. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1402. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1403. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1404. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1405. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1406. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1407. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1408. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1409. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1410. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1411. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1412. [23:27:54] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1413. java.util.ConcurrentModificationException: null
  1414. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1415. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1416. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1417. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1418. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1419. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1420. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1421. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1422. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1423. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1424. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1425. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1426. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1427. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1428. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1429. [23:27:54] [Server thread/INFO]: Preparing spawn area for Survival, 97%
  1430. [23:27:55] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1431. java.util.ConcurrentModificationException: null
  1432. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1433. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1434. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1435. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1436. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1437. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1438. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1439. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1440. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1441. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1442. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1443. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1444. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1445. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1446. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1447. [23:27:55] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1448. java.util.ConcurrentModificationException: null
  1449. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1450. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1451. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1452. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1453. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1454. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1455. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1456. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1457. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1458. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1459. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1460. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1461. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1462. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1463. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1464. [23:27:55] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1465. java.util.ConcurrentModificationException: null
  1466. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1467. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1468. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1469. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1470. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1471. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1472. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1473. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1474. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1475. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1476. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1477. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1478. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1479. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1480. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1481. [23:27:55] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1482. java.util.ConcurrentModificationException: null
  1483. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1484. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1485. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1486. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1487. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1488. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1489. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1490. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1491. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1492. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1493. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1494. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1495. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1496. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1497. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1498. [23:27:55] [Server thread/INFO]: Preparing spawn area for Survival, 97%
  1499. [23:27:55] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1500. java.util.ConcurrentModificationException: null
  1501. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1502. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1503. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1504. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1505. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1506. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1507. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1508. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1509. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1510. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1511. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1512. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1513. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1514. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1515. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1516. [23:27:56] [Server thread/WARN]: [CoreLogging] Spawn location from world.dat file was unsafe. Adjusting...
  1517. [23:27:56] [Server thread/WARN]: [CoreLogging] Original Location: X: 20 Y: 64 Z: 248 P: 0 Y: 0
  1518. [23:27:56] [Server thread/INFO]: [CoreLogging] New Spawn for 'Survival' is located at: Survival:0.00,72.00,0.00:0.00:0.00
  1519. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1520. java.util.ConcurrentModificationException: null
  1521. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1522. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1523. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1524. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1525. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1526. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1527. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1528. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1529. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1530. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1531. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1532. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1533. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1534. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1535. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1536. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1537. java.util.ConcurrentModificationException: null
  1538. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1539. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1540. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1541. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1542. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1543. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1544. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1545. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1546. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1547. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1548. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1549. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1550. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1551. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1552. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1553. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1554. java.util.ConcurrentModificationException: null
  1555. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1556. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1557. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1558. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1559. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1560. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1561. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1562. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1563. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1564. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1565. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1566. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1567. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1568. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1569. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1570. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1571. java.util.ConcurrentModificationException: null
  1572. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1573. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1574. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1575. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1576. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1577. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1578. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1579. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1580. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1581. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1582. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1583. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1584. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1585. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1586. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1587. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1588. java.util.ConcurrentModificationException: null
  1589. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1590. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1591. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1592. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1593. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1594. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1595. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1596. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1597. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1598. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1599. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1600. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1601. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1602. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1603. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1604. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1605. java.util.ConcurrentModificationException: null
  1606. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1607. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1608. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1609. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1610. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1611. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1612. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1613. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1614. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1615. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1616. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1617. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1618. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1619. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1620. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1621. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1622. java.util.ConcurrentModificationException: null
  1623. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1624. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1625. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1626. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1627. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1628. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1629. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1630. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1631. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1632. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1633. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1634. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1635. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1636. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1637. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1638. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1639. java.util.ConcurrentModificationException: null
  1640. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1641. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1642. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1643. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1644. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1645. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1646. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1647. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1648. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1649. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1650. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1651. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1652. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1653. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1654. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1655. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1656. java.util.ConcurrentModificationException: null
  1657. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1658. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1659. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1660. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1661. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1662. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1663. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1664. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1665. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1666. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1667. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1668. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1669. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1670. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1671. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1672. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1673. java.util.ConcurrentModificationException: null
  1674. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1675. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1676. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1677. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1678. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1679. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1680. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1681. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1682. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1683. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1684. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1685. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1686. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1687. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1688. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1689. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1690. java.util.ConcurrentModificationException: null
  1691. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1692. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1693. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1694. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1695. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1696. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1697. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1698. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1699. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1700. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1701. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1702. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1703. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1704. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1705. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1706. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1707. java.util.ConcurrentModificationException: null
  1708. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1709. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1710. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1711. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1712. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1713. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1714. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1715. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1716. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1717. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1718. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1719. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1720. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1721. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1722. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1723. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1724. java.util.ConcurrentModificationException: null
  1725. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1726. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1727. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1728. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1729. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1730. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1731. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1732. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1733. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1734. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1735. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1736. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1737. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1738. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1739. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1740. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1741. java.util.ConcurrentModificationException: null
  1742. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1743. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1744. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1745. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1746. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1747. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1748. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1749. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1750. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1751. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1752. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1753. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1754. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1755. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1756. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1757. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1758. java.util.ConcurrentModificationException: null
  1759. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1760. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1761. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1762. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1763. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1764. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1765. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1766. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1767. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1768. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1769. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1770. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1771. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1772. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1773. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1774. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1775. java.util.ConcurrentModificationException: null
  1776. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1777. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1778. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1779. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1780. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1781. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1782. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1783. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1784. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1785. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1786. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1787. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1788. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1789. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1790. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1791. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1792. java.util.ConcurrentModificationException: null
  1793. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1794. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1795. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1796. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1797. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1798. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1799. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1800. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1801. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1802. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1803. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1804. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1805. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1806. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1807. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1808. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1809. java.util.ConcurrentModificationException: null
  1810. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1811. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1812. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1813. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1814. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1815. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1816. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1817. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1818. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1819. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1820. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1821. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1822. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1823. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1824. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1825. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1826. java.util.ConcurrentModificationException: null
  1827. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1828. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1829. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1830. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1831. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1832. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1833. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1834. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1835. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1836. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1837. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1838. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1839. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1840. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1841. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1842. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1843. java.util.ConcurrentModificationException: null
  1844. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1845. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1846. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1847. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1848. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1849. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1850. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1851. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1852. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1853. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1854. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1855. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1856. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1857. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1858. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1859. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1860. java.util.ConcurrentModificationException: null
  1861. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1862. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1863. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1864. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1865. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1866. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1867. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1868. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1869. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1870. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1871. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1872. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1873. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1874. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1875. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1876. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1877. java.util.ConcurrentModificationException: null
  1878. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1879. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1880. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1881. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1882. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1883. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1884. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1885. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1886. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1887. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1888. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1889. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1890. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1891. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1892. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1893. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1894. java.util.ConcurrentModificationException: null
  1895. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1896. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1897. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1898. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1899. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1900. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1901. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1902. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1903. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1904. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1905. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1906. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1907. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1908. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1909. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1910. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1911. java.util.ConcurrentModificationException: null
  1912. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1913. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1914. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1915. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1916. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1917. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1918. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1919. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1920. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1921. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1922. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1923. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1924. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1925. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1926. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1927. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1928. java.util.ConcurrentModificationException: null
  1929. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1930. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1931. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1932. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1933. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1934. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1935. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1936. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1937. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1938. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1939. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1940. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1941. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1942. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1943. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1944. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1945. java.util.ConcurrentModificationException: null
  1946. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1947. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1948. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1949. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1950. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1951. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1952. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1953. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1954. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1955. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1956. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1957. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1958. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1959. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1960. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1961. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1962. java.util.ConcurrentModificationException: null
  1963. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1964. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1965. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1966. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1967. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1968. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1969. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1970. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1971. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1972. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1973. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1974. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1975. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1976. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1977. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1978. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1979. java.util.ConcurrentModificationException: null
  1980. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1981. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1982. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1983. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1984. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1985. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  1986. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1987. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1988. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1989. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1990. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1991. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1992. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1993. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1994. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  1995. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  1996. java.util.ConcurrentModificationException: null
  1997. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  1998. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  1999. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2000. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2001. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2002. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2003. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2004. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2005. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2006. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2007. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2008. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2009. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2010. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2011. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2012. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2013. java.util.ConcurrentModificationException: null
  2014. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2015. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2016. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2017. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2018. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2019. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2020. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2021. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2022. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2023. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2024. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2025. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2026. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2027. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2028. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2029. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2030. java.util.ConcurrentModificationException: null
  2031. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2032. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2033. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2034. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2035. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2036. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2037. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2038. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2039. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2040. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2041. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2042. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2043. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2044. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2045. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2046. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2047. java.util.ConcurrentModificationException: null
  2048. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2049. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2050. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2051. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2052. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2053. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2054. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2055. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2056. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2057. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2058. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2059. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2060. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2061. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2062. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2063. [23:27:58] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2064. java.util.ConcurrentModificationException: null
  2065. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2066. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2067. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2068. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2069. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2070. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2071. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2072. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2073. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2074. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2075. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2076. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2077. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2078. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2079. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2080. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2081. java.util.ConcurrentModificationException: null
  2082. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2083. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2084. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2085. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2086. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2087. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2088. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2089. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2090. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2091. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2092. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2093. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2094. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2095. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2096. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2097. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2098. java.util.ConcurrentModificationException: null
  2099. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2100. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2101. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2102. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2103. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2104. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2105. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2106. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2107. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2108. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2109. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2110. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2111. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2112. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2113. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2114. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2115. java.util.ConcurrentModificationException: null
  2116. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2117. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2118. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2119. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2120. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2121. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2122. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2123. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2124. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2125. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2126. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2127. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2128. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2129. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2130. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2131. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2132. java.util.ConcurrentModificationException: null
  2133. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2134. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2135. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2136. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2137. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2138. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2139. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2140. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2141. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2142. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2143. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2144. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2145. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2146. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2147. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2148. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2149. java.util.ConcurrentModificationException: null
  2150. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2151. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2152. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2153. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2154. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2155. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2156. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2157. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2158. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2159. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2160. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2161. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2162. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2163. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2164. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2165. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2166. java.util.ConcurrentModificationException: null
  2167. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2168. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2169. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2170. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2171. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2172. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2173. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2174. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2175. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2176. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2177. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2178. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2179. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2180. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2181. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2182. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2183. java.util.ConcurrentModificationException: null
  2184. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2185. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2186. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2187. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2188. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2189. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2190. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2191. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2192. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2193. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2194. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2195. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2196. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2197. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2198. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2199. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2200. java.util.ConcurrentModificationException: null
  2201. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2202. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2203. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2204. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2205. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2206. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2207. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2208. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2209. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2210. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2211. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2212. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2213. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2214. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2215. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2216. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2217. java.util.ConcurrentModificationException: null
  2218. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2219. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2220. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2221. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2222. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2223. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2224. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2225. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2226. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2227. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2228. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2229. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2230. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2231. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2232. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2233. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2234. java.util.ConcurrentModificationException: null
  2235. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2236. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2237. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2238. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2239. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2240. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2241. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2242. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2243. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2244. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2245. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2246. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2247. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2248. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2249. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2250. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2251. java.util.ConcurrentModificationException: null
  2252. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2253. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2254. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2255. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2256. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2257. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2258. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2259. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2260. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2261. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2262. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2263. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2264. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2265. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2266. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2267. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2268. java.util.ConcurrentModificationException: null
  2269. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2270. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2271. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2272. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2273. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2274. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2275. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2276. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2277. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2278. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2279. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2280. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2281. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2282. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2283. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2284. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2285. java.util.ConcurrentModificationException: null
  2286. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2287. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2288. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2289. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2290. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2291. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2292. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2293. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2294. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2295. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2296. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2297. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2298. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2299. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2300. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2301. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2302. java.util.ConcurrentModificationException: null
  2303. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2304. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2305. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2306. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2307. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2308. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2309. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2310. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2311. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2312. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2313. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2314. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2315. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2316. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2317. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2318. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2319. java.util.ConcurrentModificationException: null
  2320. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2321. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2322. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2323. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2324. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2325. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2326. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2327. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2328. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2329. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2330. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2331. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2332. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2333. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2334. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2335. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2336. java.util.ConcurrentModificationException: null
  2337. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2338. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2339. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2340. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2341. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2342. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2343. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2344. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2345. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2346. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2347. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2348. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2349. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2350. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2351. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2352. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2353. java.util.ConcurrentModificationException: null
  2354. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2355. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2356. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2357. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2358. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2359. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2360. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2361. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2362. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2363. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2364. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2365. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2366. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2367. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2368. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2369. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2370. java.util.ConcurrentModificationException: null
  2371. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2372. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2373. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2374. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2375. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2376. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2377. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2378. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2379. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2380. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2381. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2382. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2383. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2384. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2385. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2386. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2387. java.util.ConcurrentModificationException: null
  2388. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2389. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2390. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2391. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2392. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2393. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2394. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2395. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2396. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2397. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2398. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2399. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2400. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2401. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2402. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2403. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2404. java.util.ConcurrentModificationException: null
  2405. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2406. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2407. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2408. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2409. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2410. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2411. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2412. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2413. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2414. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2415. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2416. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2417. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2418. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2419. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2420. [23:27:59] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2421. java.util.ConcurrentModificationException: null
  2422. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2423. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2424. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2425. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2426. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2427. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2428. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2429. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2430. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2431. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2432. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2433. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2434. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2435. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2436. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2437. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2438. java.util.ConcurrentModificationException: null
  2439. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2440. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2441. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2442. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2443. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2444. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2445. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2446. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2447. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2448. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2449. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2450. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2451. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2452. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2453. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2454. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2455. java.util.ConcurrentModificationException: null
  2456. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2457. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2458. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2459. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2460. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2461. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2462. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2463. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2464. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2465. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2466. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2467. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2468. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2469. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2470. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2471. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2472. java.util.ConcurrentModificationException: null
  2473. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2474. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2475. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2476. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2477. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2478. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2479. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2480. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2481. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2482. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2483. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2484. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2485. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2486. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2487. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2488. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2489. java.util.ConcurrentModificationException: null
  2490. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2491. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2492. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2493. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2494. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2495. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2496. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2497. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2498. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2499. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2500. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2501. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2502. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2503. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2504. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2505. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2506. java.util.ConcurrentModificationException: null
  2507. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2508. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2509. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2510. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2511. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2512. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2513. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2514. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2515. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2516. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2517. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2518. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2519. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2520. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2521. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2522. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2523. java.util.ConcurrentModificationException: null
  2524. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2525. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2526. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2527. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2528. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2529. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2530. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2531. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2532. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2533. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2534. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2535. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2536. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2537. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2538. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2539. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2540. java.util.ConcurrentModificationException: null
  2541. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2542. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2543. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2544. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2545. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2546. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2547. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2548. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2549. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2550. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2551. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2552. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2553. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2554. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2555. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2556. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2557. java.util.ConcurrentModificationException: null
  2558. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2559. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2560. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2561. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2562. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2563. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2564. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2565. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2566. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2567. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2568. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2569. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2570. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2571. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2572. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2573. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2574. java.util.ConcurrentModificationException: null
  2575. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2576. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2577. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2578. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2579. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2580. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2581. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2582. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2583. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2584. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2585. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2586. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2587. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2588. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2589. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2590. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2591. java.util.ConcurrentModificationException: null
  2592. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2593. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2594. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2595. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2596. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2597. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2598. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2599. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2600. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2601. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2602. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2603. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2604. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2605. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2606. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2607. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2608. java.util.ConcurrentModificationException: null
  2609. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2610. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2611. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2612. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2613. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2614. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2615. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2616. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2617. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2618. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2619. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2620. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2621. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2622. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2623. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2624. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2625. java.util.ConcurrentModificationException: null
  2626. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2627. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2628. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2629. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2630. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2631. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2632. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2633. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2634. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2635. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2636. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2637. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2638. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2639. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2640. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2641. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2642. java.util.ConcurrentModificationException: null
  2643. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2644. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2645. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2646. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2647. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2648. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2649. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2650. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2651. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2652. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2653. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2654. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2655. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2656. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2657. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2658. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2659. java.util.ConcurrentModificationException: null
  2660. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2661. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2662. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2663. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2664. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2665. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2666. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2667. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2668. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2669. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2670. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2671. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2672. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2673. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2674. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2675. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2676. java.util.ConcurrentModificationException: null
  2677. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2678. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2679. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2680. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2681. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2682. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2683. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2684. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2685. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2686. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2687. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2688. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2689. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2690. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2691. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2692. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2693. java.util.ConcurrentModificationException: null
  2694. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2695. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2696. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2697. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2698. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2699. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2700. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2701. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2702. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2703. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2704. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2705. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2706. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2707. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2708. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2709. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2710. java.util.ConcurrentModificationException: null
  2711. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2712. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2713. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2714. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2715. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2716. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2717. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2718. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2719. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2720. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2721. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2722. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2723. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2724. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2725. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2726. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2727. java.util.ConcurrentModificationException: null
  2728. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2729. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2730. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2731. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2732. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2733. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2734. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2735. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2736. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2737. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2738. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2739. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2740. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2741. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2742. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2743. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2744. java.util.ConcurrentModificationException: null
  2745. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2746. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2747. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2748. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2749. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2750. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2751. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2752. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2753. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2754. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2755. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2756. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2757. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2758. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2759. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2760. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2761. java.util.ConcurrentModificationException: null
  2762. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2763. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2764. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2765. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2766. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2767. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2768. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2769. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2770. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2771. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2772. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2773. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2774. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2775. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2776. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2777. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2778. java.util.ConcurrentModificationException: null
  2779. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2780. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2781. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2782. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2783. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2784. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2785. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2786. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2787. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2788. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2789. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2790. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2791. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2792. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2793. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2794. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2795. java.util.ConcurrentModificationException: null
  2796. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2797. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2798. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2799. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2800. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2801. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2802. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2803. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2804. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2805. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2806. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2807. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2808. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2809. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2810. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2811. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2812. java.util.ConcurrentModificationException: null
  2813. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2814. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2815. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2816. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2817. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2818. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2819. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2820. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2821. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2822. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2823. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2824. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2825. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2826. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2827. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2828. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2829. java.util.ConcurrentModificationException: null
  2830. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2831. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2832. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2833. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2834. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2835. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2836. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2837. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2838. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2839. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2840. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2841. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2842. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2843. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2844. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2845. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2846. java.util.ConcurrentModificationException: null
  2847. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2848. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2849. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2850. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2851. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2852. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2853. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2854. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2855. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2856. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2857. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2858. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2859. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2860. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2861. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2862. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2863. java.util.ConcurrentModificationException: null
  2864. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2865. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2866. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2867. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2868. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2869. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2870. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2871. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2872. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2873. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2874. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2875. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2876. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2877. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2878. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2879. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2880. java.util.ConcurrentModificationException: null
  2881. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2882. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2883. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2884. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2885. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2886. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2887. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2888. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2889. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2890. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2891. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2892. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2893. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2894. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2895. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2896. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2897. java.util.ConcurrentModificationException: null
  2898. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2899. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2900. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2901. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2902. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2903. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2904. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2905. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2906. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2907. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2908. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2909. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2910. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2911. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2912. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2913. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2914. java.util.ConcurrentModificationException: null
  2915. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2916. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2917. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2918. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2919. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2920. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2921. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2922. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2923. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2924. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2925. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2926. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2927. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2928. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2929. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2930. [23:28:00] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2931. java.util.ConcurrentModificationException: null
  2932. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2933. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2934. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2935. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2936. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2937. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2938. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2939. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2940. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2941. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2942. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2943. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2944. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2945. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2946. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2947. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2948. java.util.ConcurrentModificationException: null
  2949. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2950. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2951. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2952. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2953. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2954. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2955. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2956. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2957. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2958. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2959. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2960. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2961. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2962. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2963. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2964. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2965. java.util.ConcurrentModificationException: null
  2966. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2967. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2968. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2969. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2970. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2971. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2972. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2973. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2974. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2975. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2976. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2977. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2978. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2979. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2980. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2981. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2982. java.util.ConcurrentModificationException: null
  2983. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  2984. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  2985. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2986. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2987. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2988. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  2989. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2990. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2991. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2992. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2993. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2994. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2995. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2996. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2997. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  2998. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  2999. java.util.ConcurrentModificationException: null
  3000. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3001. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3002. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3003. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3004. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3005. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3006. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3007. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3008. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3009. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3010. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3011. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3012. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3013. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3014. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3015. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3016. java.util.ConcurrentModificationException: null
  3017. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3018. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3019. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3020. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3021. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3022. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3023. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3024. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3025. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3026. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3027. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3028. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3029. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3030. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3031. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3032. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3033. java.util.ConcurrentModificationException: null
  3034. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3035. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3036. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3037. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3038. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3039. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3040. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3041. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3042. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3043. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3044. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3045. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3046. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3047. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3048. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3049. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3050. java.util.ConcurrentModificationException: null
  3051. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3052. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3053. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3054. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3055. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3056. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3057. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3058. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3059. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3060. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3061. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3062. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3063. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3064. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3065. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3066. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3067. java.util.ConcurrentModificationException: null
  3068. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3069. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3070. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3071. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3072. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3073. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3074. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3075. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3076. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3077. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3078. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3079. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3080. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3081. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3082. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3083. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3084. java.util.ConcurrentModificationException: null
  3085. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3086. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3087. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3088. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3089. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3090. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3091. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3092. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3093. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3094. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3095. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3096. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3097. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3098. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3099. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3100. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3101. java.util.ConcurrentModificationException: null
  3102. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3103. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3104. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3105. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3106. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3107. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3108. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3109. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3110. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3111. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3112. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3113. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3114. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3115. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3116. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3117. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3118. java.util.ConcurrentModificationException: null
  3119. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3120. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3121. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3122. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3123. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3124. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3125. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3126. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3127. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3128. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3129. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3130. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3131. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3132. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3133. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3134. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3135. java.util.ConcurrentModificationException: null
  3136. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3137. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3138. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3139. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3140. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3141. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3142. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3143. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3144. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3145. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3146. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3147. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3148. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3149. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3150. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3151. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3152. java.util.ConcurrentModificationException: null
  3153. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3154. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3155. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3156. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3157. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3158. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3159. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3160. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3161. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3162. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3163. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3164. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3165. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3166. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3167. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3168. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3169. java.util.ConcurrentModificationException: null
  3170. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3171. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3172. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3173. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3174. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3175. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3176. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3177. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3178. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3179. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3180. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3181. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3182. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3183. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3184. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3185. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3186. java.util.ConcurrentModificationException: null
  3187. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3188. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3189. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3190. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3191. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3192. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3193. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3194. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3195. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3196. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3197. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3198. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3199. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3200. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3201. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3202. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3203. java.util.ConcurrentModificationException: null
  3204. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3205. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3206. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3207. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3208. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3209. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3210. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3211. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3212. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3213. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3214. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3215. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3216. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3217. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3218. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3219. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3220. java.util.ConcurrentModificationException: null
  3221. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3222. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3223. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3224. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3225. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3226. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3227. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3228. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3229. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3230. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3231. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3232. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3233. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3234. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3235. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3236. [23:28:01] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3237. java.util.ConcurrentModificationException: null
  3238. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3239. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3240. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3241. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3242. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3243. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3244. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3245. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3246. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3247. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3248. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3249. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3250. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3251. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3252. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3253. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3254. java.util.ConcurrentModificationException: null
  3255. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3256. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3257. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3258. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3259. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3260. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3261. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3262. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3263. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3264. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3265. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3266. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3267. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3268. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3269. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3270. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3271. java.util.ConcurrentModificationException: null
  3272. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3273. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3274. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3275. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3276. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3277. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3278. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3279. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3280. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3281. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3282. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3283. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3284. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3285. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3286. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3287. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3288. java.util.ConcurrentModificationException: null
  3289. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3290. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3291. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3292. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3293. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3294. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3295. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3296. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3297. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3298. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3299. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3300. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3301. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3302. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3303. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3304. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3305. java.util.ConcurrentModificationException: null
  3306. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3307. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3308. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3309. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3310. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3311. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3312. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3313. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3314. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3315. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3316. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3317. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3318. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3319. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3320. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3321. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3322. java.util.ConcurrentModificationException: null
  3323. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3324. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3325. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3326. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3327. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3328. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3329. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3330. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3331. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3332. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3333. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3334. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3335. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3336. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3337. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3338. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3339. java.util.ConcurrentModificationException: null
  3340. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3341. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3342. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3343. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3344. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3345. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3346. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3347. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3348. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3349. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3350. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3351. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3352. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3353. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3354. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3355. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3356. java.util.ConcurrentModificationException: null
  3357. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3358. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3359. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3360. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3361. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3362. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3363. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3364. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3365. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3366. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3367. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3368. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3369. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3370. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3371. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3372. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3373. java.util.ConcurrentModificationException: null
  3374. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3375. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3376. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3377. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3378. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3379. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3380. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3381. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3382. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3383. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3384. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3385. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3386. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3387. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3388. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3389. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3390. java.util.ConcurrentModificationException: null
  3391. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3392. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3393. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3394. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3395. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3396. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3397. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3398. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3399. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3400. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3401. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3402. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3403. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3404. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3405. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3406. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3407. java.util.ConcurrentModificationException: null
  3408. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3409. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3410. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3411. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3412. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3413. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3414. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3415. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3416. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3417. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3418. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3419. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3420. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3421. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3422. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3423. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3424. java.util.ConcurrentModificationException: null
  3425. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3426. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3427. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3428. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3429. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3430. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3431. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3432. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3433. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3434. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3435. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3436. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3437. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3438. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3439. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3440. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3441. java.util.ConcurrentModificationException: null
  3442. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3443. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3444. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3445. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3446. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3447. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3448. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3449. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3450. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3451. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3452. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3453. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3454. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3455. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3456. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3457. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3458. java.util.ConcurrentModificationException: null
  3459. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3460. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3461. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3462. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3463. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3464. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3465. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3466. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3467. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3468. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3469. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3470. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3471. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3472. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3473. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3474. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3475. java.util.ConcurrentModificationException: null
  3476. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3477. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3478. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3479. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3480. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3481. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3482. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3483. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3484. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3485. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3486. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3487. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3488. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3489. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3490. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3491. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3492. java.util.ConcurrentModificationException: null
  3493. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3494. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3495. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3496. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3497. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3498. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3499. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3500. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3501. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3502. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3503. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3504. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3505. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3506. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3507. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3508. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3509. java.util.ConcurrentModificationException: null
  3510. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3511. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3512. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3513. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3514. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3515. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3516. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3517. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3518. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3519. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3520. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3521. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3522. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3523. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3524. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3525. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3526. java.util.ConcurrentModificationException: null
  3527. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3528. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3529. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3530. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3531. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3532. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3533. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3534. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3535. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3536. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3537. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3538. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3539. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3540. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3541. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3542. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3543. java.util.ConcurrentModificationException: null
  3544. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3545. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3546. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3547. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3548. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3549. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3550. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3551. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3552. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3553. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3554. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3555. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3556. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3557. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3558. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3559. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3560. java.util.ConcurrentModificationException: null
  3561. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3562. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3563. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3564. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3565. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3566. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3567. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3568. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3569. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3570. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3571. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3572. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3573. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3574. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3575. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3576. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3577. java.util.ConcurrentModificationException: null
  3578. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3579. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3580. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3581. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3582. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3583. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3584. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3585. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3586. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3587. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3588. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3589. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3590. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3591. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3592. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3593. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3594. java.util.ConcurrentModificationException: null
  3595. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3596. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3597. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3598. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3599. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3600. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3601. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3602. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3603. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3604. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3605. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3606. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3607. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3608. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3609. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3610. [23:28:02] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3611. java.util.ConcurrentModificationException: null
  3612. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3613. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3614. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3615. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3616. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3617. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3618. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3619. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3620. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3621. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3622. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3623. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3624. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3625. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3626. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3627. [23:28:03] [Spigot Watchdog Thread/ERROR]: Failed to save chunk
  3628. java.util.ConcurrentModificationException: null
  3629. at java.util.TreeMap$PrivateEntryIterator.nextEntry(Unknown Source) ~[?:1.8.0_191]
  3630. at java.util.TreeMap$KeyIterator.next(Unknown Source) ~[?:1.8.0_191]
  3631. at org.bukkit.craftbukkit.v1_12_R1.util.HashTreeSet$1.next(HashTreeSet.java:47) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3632. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:819) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3633. at net.minecraft.server.v1_12_R1.WorldServer.a(WorldServer.java:802) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3634. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveEntities(ChunkRegionLoader.java:357) ~[spigot.jar:git-Spigot-dcd1643-e60fc34]
  3635. at net.minecraft.server.v1_12_R1.ChunkRegionLoader.saveChunk(ChunkRegionLoader.java:139) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3636. at net.minecraft.server.v1_12_R1.ChunkProviderServer.saveChunk(ChunkProviderServer.java:209) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3637. at net.minecraft.server.v1_12_R1.ChunkProviderServer.a(ChunkProviderServer.java:232) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3638. at net.minecraft.server.v1_12_R1.WorldServer.save(WorldServer.java:1055) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3639. at net.minecraft.server.v1_12_R1.MinecraftServer.saveChunks(MinecraftServer.java:440) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3640. at net.minecraft.server.v1_12_R1.MinecraftServer.stop(MinecraftServer.java:494) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3641. at org.spigotmc.RestartCommand.restart(RestartCommand.java:121) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3642. at org.spigotmc.RestartCommand.restart(RestartCommand.java:40) [spigot.jar:git-Spigot-dcd1643-e60fc34]
  3643. at org.spigotmc.WatchdogThread.run(WatchdogThread.java:85) [spigot.jar:git-Spigot-dcd1643-e60fc34]
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