16:45:01 [INFO] CONSOLE: Disabling level saving..
16:45:01 [INFO] CONSOLE: Forcing save..
16:45:01 [SEVERE] java.util.ConcurrentModificationException
16:45:01 [SEVERE]       at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
16:45:01 [SEVERE]       at java.util.AbstractList$Itr.next(AbstractList.java:343)
16:45:01 [SEVERE]       at net.minecraft.server.ChunkRegionLoader.a(ChunkRegionLoader.java:191)
16:45:01 [SEVERE]       at net.minecraft.server.ChunkRegionLoader.a(ChunkRegionLoader.java:85)
16:45:01 [SEVERE]       at net.minecraft.server.ChunkProviderServer.saveChunk(ChunkProviderServer.java:163)
16:45:01 [SEVERE]       at net.minecraft.server.ChunkProviderServer.saveChunks(ChunkProviderServer.java:212)
16:45:01 [SEVERE]       at net.minecraft.server.World.save(World.java:255)
16:45:01 [SEVERE]       at org.bukkit.craftbukkit.CraftWorld.save(CraftWorld.java:655)
16:45:01 [SEVERE]       at org.bukkit.command.defaults.SaveCommand.execute(SaveCommand.java:25)
16:45:01 [SEVERE]       at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:166)
16:45:01 [SEVERE]       at org.bukkit.craftbukkit.CraftServer.dispatchCommand(CraftServer.java:473)
16:45:01 [SEVERE]       at org.bukkit.craftbukkit.CraftServer.dispatchServerCommand(CraftServer.java:469)
16:45:01 [SEVERE]       at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:596)
16:45:01 [SEVERE]       at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:469)
16:45:01 [SEVERE]       at net.minecraft.server.ThreadServerApplication.run(SourceFile:492)
16:45:01 [INFO] CONSOLE: Save complete.