---- Minecraft Crash Report ----
// Quite honestly, I wouldn't worry myself about that.

Time: 01/06/17 23:14
Description: Exception ticking world

java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.remove(HashMap.java:940)
	at lv.d(SourceFile:198)
	at lw.d(SourceFile:201)
	at net.minecraft.server.MinecraftServer.D(SourceFile:626)
	at lh.D(SourceFile:335)
	at net.minecraft.server.MinecraftServer.C(SourceFile:562)
	at net.minecraft.server.MinecraftServer.run(SourceFile:466)
	at java.lang.Thread.run(Thread.java:745)


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

-- Head --
Thread: Server thread
Stacktrace:
	at java.util.HashMap$HashIterator.remove(HashMap.java:940)
	at lv.d(SourceFile:198)
	at lw.d(SourceFile:201)

-- Affected level --
Details:
	Level name: world
	All players: 0 total; []
	Chunk stats: ServerChunkCache: 360 Drop: 89
	Level seed: 902806748236634866
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (-88,64,428), Chunk: (at 8,4,12 in -6,26; contains blocks -96,0,416 to -81,255,431), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 14693487 game time, 2018430 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 71825 (now: false), thunder time: 65473 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
	at net.minecraft.server.MinecraftServer.D(SourceFile:626)
	at lh.D(SourceFile:335)
	at net.minecraft.server.MinecraftServer.C(SourceFile:562)
	at net.minecraft.server.MinecraftServer.run(SourceFile:466)
	at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
	Minecraft Version: 1.11.2
	Operating System: Linux (amd64) version 3.14.32-xxxx-grs-ipv6-64
	Java Version: 1.7.0_131, Oracle Corporation
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 100485992 bytes (95 MB) / 197132288 bytes (188 MB) up to 620756992 bytes (592 MB)
	JVM Flags: 0 total; 
	IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
	Profiler Position: N/A (disabled)
	Player Count: 0 / 20; []
	Is Modded: Unknown (can't tell)
	Type: Dedicated Server (map_server.txt)