---- Minecraft Crash Report ----
// This doesn't make any sense!

Time: 1/20/16 10:23 PM
Description: Ticking entity

java.util.ConcurrentModificationException
        at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
        at java.util.ArrayList$Itr.next(ArrayList.java:851)
        at net.minecraft.world.World.func_175644_a(SourceFile:2242)
        at net.minecraft.entity.ai.EntityAINearestAttackableTarget.onGetEntitiesWithinAABB(SourceFile:89)
        at net.minecraft.entity.ai.EntityAINearestAttackableTarget.func_75250_a(SourceFile:72)
        at net.minecraft.entity.ai.EntityAITasks.func_75774_a(SourceFile:72)
        at net.minecraft.entity.EntityLiving.func_70626_be(SourceFile:465)
        at net.minecraft.entity.EntityLivingBase.func_70636_d(SourceFile:1432)
        at net.minecraft.entity.EntityLiving.func_70636_d(SourceFile:339)
        at net.minecraft.entity.monster.EntityMob.func_70636_d(SourceFile:27)
        at net.minecraft.entity.monster.EntityZombie.func_70636_d(SourceFile:202)
        at net.minecraft.entity.EntityLivingBase.func_70071_h_(SourceFile:1300)
        at net.minecraft.entity.EntityLiving.func_70071_h_(SourceFile:211)
        at net.minecraft.entity.monster.EntityMob.func_70071_h_(SourceFile:32)
        at net.minecraft.entity.monster.EntityZombie.func_70071_h_(SourceFile:258)
        at net.minecraft.world.World.onCallEntityUpdate(SourceFile:484)
        at net.minecraft.world.World.func_72866_a(SourceFile:1408)
        at net.minecraft.world.WorldServer.func_72866_a(SourceFile:597)
        at net.minecraft.world.World.func_72870_g(SourceFile:1386)
        at net.minecraft.world.World.func_72939_s(SourceFile:1279)
        at net.minecraft.world.WorldServer.func_72939_s(SourceFile:478)
        at net.minecraft.server.MinecraftServer.func_71190_q(SourceFile:153)
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(SourceFile:299)
        at net.minecraft.server.MinecraftServer.func_71217_p(SourceFile:535)
        at net.minecraft.server.MinecraftServer.run(SourceFile:451)
        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 --
Stacktrace:
        at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
        at java.util.ArrayList$Itr.next(ArrayList.java:851)
        at net.minecraft.world.World.func_175644_a(SourceFile:2242)
        at net.minecraft.entity.ai.EntityAINearestAttackableTarget.onGetEntitiesWithinAABB(SourceFile:89)
        at net.minecraft.entity.ai.EntityAINearestAttackableTarget.func_75250_a(SourceFile:72)
        at net.minecraft.entity.ai.EntityAITasks.func_75774_a(SourceFile:72)
        at net.minecraft.entity.EntityLiving.func_70626_be(SourceFile:465)
        at net.minecraft.entity.EntityLivingBase.func_70636_d(SourceFile:1432)
        at net.minecraft.entity.EntityLiving.func_70636_d(SourceFile:339)
        at net.minecraft.entity.monster.EntityMob.func_70636_d(SourceFile:27)
        at net.minecraft.entity.monster.EntityZombie.func_70636_d(SourceFile:202)
        at net.minecraft.entity.EntityLivingBase.func_70071_h_(SourceFile:1300)
        at net.minecraft.entity.EntityLiving.func_70071_h_(SourceFile:211)
        at net.minecraft.entity.monster.EntityMob.func_70071_h_(SourceFile:32)
        at net.minecraft.entity.monster.EntityZombie.func_70071_h_(SourceFile:258)
        at net.minecraft.world.World.onCallEntityUpdate(SourceFile:484)
        at net.minecraft.world.World.func_72866_a(SourceFile:1408)
        at net.minecraft.world.WorldServer.func_72866_a(SourceFile:597)
        at net.minecraft.world.World.func_72870_g(SourceFile:1386)

-- Entity being ticked --
Details:
        Entity Type: Zombie (net.minecraft.entity.monster.EntityZombie)
        Entity ID: 818404
        Entity Name: Zombie
        Entity's Exact location: -423.50, 85.00, -347.50
        Entity's Block location: -424.00,85.00,-348.00 - World: (-424,85,-348), Chunk: (at 8,5,4 in -27,-22; contains blocks -432,0,-352 to -417,255,-337), $
        Entity's Momentum: 0.00, -0.08, 0.00
        Entity's Rider: ~~ERROR~~ NullPointerException: null
        Entity's Vehicle: ~~ERROR~~ NullPointerException: null
Stacktrace:
        at net.minecraft.world.World.func_72939_s(SourceFile:1279)
        at net.minecraft.world.WorldServer.func_72939_s(SourceFile:478)

-- Affected level --
Details:
        Level name: garrison2
        All players: 2 total; [EntityPlayerMP['trasmus'/425356, l='garrison2', x=-514.95, y=105.28, z=-384.76], EntityPlayerMP['CAKEis4REAL'/770517, l='garr$
        Chunk stats: ServerChunkCache: 894 Drop: 0
        Level seed: 3488119232474326091
        Level generator: ID 00 - default, ver 1. Features enabled: true
        Level generator options:
        Level spawn location: -151.00,64.00,73.00 - World: (-151,64,73), Chunk: (at 9,4,9 in -10,4; contains blocks -160,0,64 to -145,255,79), Region: (-1,0$
        Level time: 434896049 game time, 17943 day time
        Level dimension: 0
        Level storage version: 0x04ABD - Anvil
        Level weather: Rain time: 1 (now: false), thunder time: 1 (now: false)
        Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
        at net.minecraft.server.MinecraftServer.func_71190_q(SourceFile:153)
        at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(SourceFile:299)
        at net.minecraft.server.MinecraftServer.func_71217_p(SourceFile:535)
        at net.minecraft.server.MinecraftServer.run(SourceFile:451)
        at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
        Minecraft Version: 1.8.9
        Operating System: Linux (amd64) version 3.10.0-329.7.2.lve1.3.58.el7.x86_64
        Java Version: 1.8.0_65, Oracle Corporation
        Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
        Memory: 687156936 bytes (655 MB) / 1240858624 bytes (1183 MB) up to 4277534720 bytes (4079 MB)
        JVM Flags: 7 total; -Xms1G -Xmx4G -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+CMSIncrementalPacing -XX:ParallelGCThreads=2 -XX:+AggressiveOpts
        IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
        Plugins:
                Plugin{id=minecraft, name=Minecraft, version=1.8.9}
                Plugin{id=sponge, name=SpongeVanilla, version=1.8.9-3.1.0-BETA-196}
                Plugin{id=NoteBlockAPI, name=NoteBlockAPI, version=2.0, source=mods/noteblockapi-2.0.jar}
                Plugin{id=spongeapi, name=SpongeAPI, version=3.1.0-SNAPSHOT-aa7499e}
                Plugin{id=worldedit, name=WorldEdit, version=6.1.1-SNAPSHOT, source=mods/worldedit-spongevanilla-mc1.8.9-6.1.1-SNAPSHOT-dist.jar}
                Plugin{id=musicbox, name=MusicBox, version=0.1, source=mods/musicbox-0.1.jar}
                Plugin{id=Graveyards, name=Graveyards, version=1.1.1, source=mods/Graveyards.jar}
        Profiler Position: N/A (disabled)
        Player Count: 2 / 1000000; [EntityPlayerMP['trasmus'/425356, l='garrison2', x=-514.95, y=105.28, z=-384.76], EntityPlayerMP['CAKEis4REAL'/770517, l=$
        Is Modded: Definitely; Server brand changed to 'SpongeVanilla'
        Type: Dedicated Server (map_server.txt)