---- Minecraft Crash Report ----
// Why did you do that?

Time: 29/11/16 3:25 PM
Description: Exception in server tick loop

java.lang.RuntimeException: Modification whilst iterating!
	at net.minecraft.server.v1_11_R1.ChunkProviderServer$1.put(ChunkProviderServer.java:89)
	at net.minecraft.server.v1_11_R1.ChunkProviderServer$1.put(ChunkProviderServer.java:57)
	at net.minecraft.server.v1_11_R1.ChunkProviderServer.originalGetChunkAt(ChunkProviderServer.java:323)
	at net.minecraft.server.v1_11_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:292)
	at net.minecraft.server.v1_11_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:272)
	at net.minecraft.server.v1_11_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:268)
	at net.minecraft.server.v1_11_R1.World.getType(World.java:881)
	at net.minecraft.server.v1_11_R1.World.a(World.java:2370)
	at net.minecraft.server.v1_11_R1.World.c(World.java:2497)
	at net.minecraft.server.v1_11_R1.World.w(World.java:2362)
	at net.minecraft.server.v1_11_R1.World.lambda$setTypeAndData$0(World.java:405)
	at net.minecraft.server.v1_11_R1.PaperLightingQueue$LightingQueue.processQueue(PaperLightingQueue.java:79)
	at net.minecraft.server.v1_11_R1.PaperLightingQueue$LightingQueue.access$000(PaperLightingQueue.java:48)
	at net.minecraft.server.v1_11_R1.PaperLightingQueue.processQueue(PaperLightingQueue.java:29)
	at net.minecraft.server.v1_11_R1.MinecraftServer.C(MinecraftServer.java:801)
	at net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:648)
	at java.lang.Thread.run(Thread.java:745)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
	Minecraft Version: 1.11
	Operating System: Linux (amd64) version 4.4.0-47-generic
	Java Version: 1.8.0_111, Oracle Corporation
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 303151096 bytes (289 MB) / 466616320 bytes (445 MB) up to 1849688064 bytes (1764 MB)
	JVM Flags: 0 total;
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	CraftBukkit Information:
   Running: Paper version git-Paper-"8483e67" (MC: 1.11) (Implementing API version 1.11-R0.1-SNAPSHOT) true
   Plugins: {}
   Warnings: DEFAULT
   Reload Count: 0
   Threads: { WAITING Finalizer: [java.lang.Object.wait(Native Method), java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143), java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164), java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)], TIMED_WAITING Server Infinisleeper: [java.lang.Thread.sleep(Native Method), net.minecraft.server.v1_11_R1.DedicatedServer$1.run(DedicatedServer.java:59)], TIMED_WAITING process reaper: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215), java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(SynchronousQueue.java:460), java.util.concurrent.SynchronousQueue$TransferStack.transfer(SynchronousQueue.java:362), java.util.concurrent.SynchronousQueue.poll(SynchronousQueue.java:941), java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1066), java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127), java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617), java.lang.Thread.run(Thread.java:745)], RUNNABLE Server thread: [java.lang.Thread.dumpThreads(Native Method), java.lang.Thread.getAllStackTraces(Thread.java:1607), org.bukkit.craftbukkit.v1_11_R1.CraftCrashReport.call(CraftCrashReport.java:30), net.minecraft.server.v1_11_R1.CrashReportSystemDetails.a(SourceFile:78), net.minecraft.server.v1_11_R1.CrashReport.h(CrashReport.java:126), net.minecraft.server.v1_11_R1.CrashReport.<init>(CrashReport.java:33), net.minecraft.server.v1_11_R1.MinecraftServer.run(MinecraftServer.java:668), java.lang.Thread.run(Thread.java:745)], RUNNABLE Signal Dispatcher: [], RUNNABLE Netty Epoll Server IO #0: [io.netty.channel.epoll.Native.epollWait(Native Method), io.netty.channel.epoll.EpollEventLoop.epollWait(EpollEventLoop.java:194), io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:219), io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116), java.lang.Thread.run(Thread.java:745)], RUNNABLE DestroyJavaVM: [], TIMED_WAITING File IO Thread: [java.lang.Thread.sleep(Native Method), net.minecraft.server.v1_11_R1.FileIOThread.c(FileIOThread.java:55), net.minecraft.server.v1_11_R1.FileIOThread.run(FileIOThread.java:28), java.lang.Thread.run(Thread.java:745)], TIMED_WAITING Paper Watchdog Thread: [java.lang.Thread.sleep(Native Method), org.spigotmc.WatchdogThread.run(WatchdogThread.java:92)], WAITING Paper Async Task Handler Thread - 0: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.park(LockSupport.java:175), java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039), java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442), java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067), java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127), java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617), java.lang.Thread.run(Thread.java:745)], WAITING Thread-5: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.park(LockSupport.java:175), java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039), java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442), com.mojang.util.QueueLogAppender.getNextLogEvent(QueueLogAppender.java:77), org.bukkit.craftbukkit.v1_11_R1.util.TerminalConsoleWriterThread.run(TerminalConsoleWriterThread.java:27), java.lang.Thread.run(Thread.java:745)], RUNNABLE Server console handler: [java.io.FileInputStream.readBytes(Native Method), java.io.FileInputStream.read(FileInputStream.java:255), java.io.BufferedInputStream.fill(BufferedInputStream.java:246), java.io.BufferedInputStream.read(BufferedInputStream.java:265), org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:169), org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:137), org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.read(NonBlockingInputStream.java:246), org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:261), org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:198), org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.readCharacter(ConsoleReader.java:2145), org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.readLine(ConsoleReader.java:2349), net.minecraft.server.v1_11_R1.DedicatedServer$2.run(DedicatedServer.java:84)], WAITING Reference Handler: [java.lang.Object.wait(Native Method), java.lang.Object.wait(Object.java:502), java.lang.ref.Reference.tryHandlePending(Reference.java:191), java.lang.ref.Reference$ReferenceHandler.run(Reference.java:153)], WAITING Snooper Timer: [java.lang.Object.wait(Native Method), java.lang.Object.wait(Object.java:502), java.util.TimerThread.mainLoop(Timer.java:526), java.util.TimerThread.run(Timer.java:505)], WAITING NonBlockingInputStreamThread: [java.lang.Object.wait(Native Method), org.bukkit.craftbukkit.libs.jline.internal.NonBlockingInputStream.run(NonBlockingInputStream.java:278), java.lang.Thread.run(Thread.java:745)],}
   Recent tasks from -25-5{}
	Profiler Position: N/A (disabled)
	Player Count: 0 / 20; []
	Is Modded: Definitely; Server brand changed to 'Paper'
	Type: Dedicated Server (map_server.txt)