Server Crash for unknown error (Caused by plugins?)

My server crashes for some odd reason can someone help?

Code:

// Why did you do that?

Time: 31/12/15 4:25 PM
Description: Ticking entity

java.util.NoSuchElementException
    at org.bukkit.craftbukkit.v1_8_R3.util.UnsafeList$Itr.next(UnsafeList.java:248)
    at net.minecraft.server.v1_8_R3.PathfinderGoalSelector.a(PathfinderGoalSelector.java:56)
    at net.minecraft.server.v1_8_R3.EntityInsentient.doTick(EntityInsentient.java:470)
    at net.minecraft.server.v1_8_R3.EntityLiving.m(EntityLiving.java:1626)
    at net.minecraft.server.v1_8_R3.EntityInsentient.m(EntityInsentient.java:338)
    at net.minecraft.server.v1_8_R3.EntityAgeable.m(EntityAgeable.java:139)
    at net.minecraft.server.v1_8_R3.EntityAnimal.m(EntityAnimal.java:23)
    at net.minecraft.server.v1_8_R3.EntityWolf.m(EntityWolf.java:136)
    at net.minecraft.server.v1_8_R3.EntityLiving.t_(EntityLiving.java:1487)
    at net.minecraft.server.v1_8_R3.EntityInsentient.t_(EntityInsentient.java:193)
    at net.minecraft.server.v1_8_R3.EntityWolf.t_(EntityWolf.java:151)
    at net.minecraft.server.v1_8_R3.World.entityJoinedWorld(World.java:1607)
    at net.minecraft.server.v1_8_R3.World.g(World.java:1582)
    at net.minecraft.server.v1_8_R3.World.tickEntities(World.java:1425)
    at net.minecraft.server.v1_8_R3.WorldServer.tickEntities(WorldServer.java:597)
    at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:786)
    at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374)
    at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654)
    at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557)
    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 org.bukkit.craftbukkit.v1_8_R3.util.UnsafeList$Itr.next(UnsafeList.java:248)
    at net.minecraft.server.v1_8_R3.PathfinderGoalSelector.a(PathfinderGoalSelector.java:56)
    at net.minecraft.server.v1_8_R3.EntityInsentient.doTick(EntityInsentient.java:470)
    at net.minecraft.server.v1_8_R3.EntityLiving.m(EntityLiving.java:1626)
    at net.minecraft.server.v1_8_R3.EntityInsentient.m(EntityInsentient.java:338)
    at net.minecraft.server.v1_8_R3.EntityAgeable.m(EntityAgeable.java:139)
    at net.minecraft.server.v1_8_R3.EntityAnimal.m(EntityAnimal.java:23)
    at net.minecraft.server.v1_8_R3.EntityWolf.m(EntityWolf.java:136)
    at net.minecraft.server.v1_8_R3.EntityLiving.t_(EntityLiving.java:1487)
    at net.minecraft.server.v1_8_R3.EntityInsentient.t_(EntityInsentient.java:193)
    at net.minecraft.server.v1_8_R3.EntityWolf.t_(EntityWolf.java:151)
    at net.minecraft.server.v1_8_R3.World.entityJoinedWorld(World.java:1607)
    at net.minecraft.server.v1_8_R3.World.g(World.java:1582)

-- Entity being ticked --
Details:
    Entity Type: Wolf (net.minecraft.server.v1_8_R3.EntityWolf)
    Entity ID: 204
    Entity Name: §7Starved Canine
    Entity's Exact location: 883.15, 65.00, -89.75
    Entity's Block location: 883.00,65.00,-90.00 - World: (883,65,-90), Chunk: (at 3,4,6 in 55,-6; contains blocks 880,0,-96 to 895,255,-81), Region: (1,-1; contains chunks 32,-32 to 63,-1, blocks 512,0,-512 to 1023,255,-1)
    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.server.v1_8_R3.World.tickEntities(World.java:1425)
    at net.minecraft.server.v1_8_R3.WorldServer.tickEntities(WorldServer.java:597)

-- Affected level --
Details:
    Level name: world
    All players: 1 total; [EntityPlayer['P_Squidy'/168, l='world', x=893.39, y=72.28, z=-47.25](P_Squidy at 893.3909232962939,72.27882171170363,-47.24844309254121)]
    Chunk stats: ServerChunkCache: 617 Drop: 0
    Level seed: -7232127757490375228
    Level generator: ID 00 - default, ver 1. Features enabled: true
    Level generator options:
    Level spawn location: 666.00,67.00,-43.00 - World: (666,67,-43), Chunk: (at 10,4,5 in 41,-3; contains blocks 656,0,-48 to 671,255,-33), Region: (1,-1; contains chunks 32,-32 to 63,-1, blocks 512,0,-512 to 1023,255,-1)
    Level time: 3155380 game time, 3767830 day time
    Level dimension: 0
    Level storage version: 0x04ABD - Anvil
    Level weather: Rain time: 70993 (now: false), thunder time: 112705 (now: false)
    Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
    at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:786)
    at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374)
    at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654)
    at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557)
    at java.lang.Thread.run(Thread.java:745)

-- System Details --
Details:
    Minecraft Version: 1.8.8
    Operating System: Linux (i386) version 4.2.0-22-generic
    Java Version: 1.8.0_66-internal, Oracle Corporation
    Java VM Version: OpenJDK Server VM (mixed mode), Oracle Corporation
    Memory: 625586128 bytes (596 MB) / 770965504 bytes (735 MB) up to 954466304 bytes (910 MB)
    JVM Flags: 2 total; -Xms512M -Xmx1024M
    IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
    CraftBukkit Information:
   Running: CraftBukkit version git-Spigot-db6de12-18fbb24 (MC: 1.8.8) (Implementing API version 1.8.8-R0.1-SNAPSHOT) true
   Plugins: { WorldEdit v6.1;no_git_id com.sk89q.worldedit.bukkit.WorldEditPlugin [], HealthBar v1.8.2 com.gmail.filoghost.healthbar.Main [filoghost], RandomArmorEffects v2.1 randomArmorEffects.Main [RandomHashTags], GroupManager v2.1.31 (Phoenix) org.anjocaido.groupmanager.GroupManager [AnjoCaido, Gabriel Couto, ElgarL], SimpleWarnings v1.0 me.odium.simplewarnings.SimpleWarnings [], HolographicDisplays v2.1.10 com.gmail.filoghost.holographicdisplays.HolographicDisplays [], EnchantmentAPI v4.27 com.rit.sucy.EnchantmentAPI [], EnchantPotionPack v1.0 com.sucy.potion.EnchantPotionPack [], SilkSpawners v3.6.7 de.dustplanet.silkspawners.SilkSpawners [xGhOsTkiLLeRx, mushroomhostage], Shopkeepers v1.68 com.nisovin.shopkeepers.ShopkeepersPlugin [nisovin, blablubbabc], ObsidianBreaker v2.2 com.creeperevents.oggehej.obsidianbreaker.ObsidianBreaker [oggehej], CompassTracker v1.2 com.ownedcraft.Main [Oubliette], DispenserTools v2.0 de.craftandbuild.DispenserTools.DispenserTools [slowbuild], Vault v1.5.6-b49 net.milkbowl.vault.Vault [cereal, Sleaker, mung3r], CustomEnchantments v2.3c com.taiter.ce.Main [], MassiveCore v2.8.2 com.massivecraft.massivecore.MassiveCore [Cayorion], EnchantTrapPack v1.0 com.sucy.trap.EnchantTrapPack [], EnchantPassivePack v1.0 com.sucy.passive.EnchantPassivePack [], Essentials v2.0.1-b237 com.earth2me.essentials.Essentials [Zenexer, ementalo, Aelux, Brettflan, KimKandor, snowleo, ceulemans, Xeology, KHobbits, md_5, Iaccidentally, drtshock, vemacs], Banknotes v0.1.5 me.sainttx.banknotes.BanknotePlugin [SainttX], MythicMobs v2.1.9 net.elseland.xikage.MythicMobs.MythicMobs [Xikage AKA Ashijin], AdvancedAchievements v2.2.1 com.hm.achievement.AdvancedAchievements [DarkPyves], EssentialsChat vTeamCity com.earth2me.essentials.chat.EssentialsChat [Zenexer, ementalo, Aelux, Brettflan, KimKandor, snowleo, ceulemans, Xeology, KHobbits, md_5, Okamosy, Iaccidentally], GlobalMarket v1.2.2 com.survivorserver.GlobalMarket.Market [], PlayerVaults v3.5.7-b${BUILD_NUMBER} com.drtshock.playervaults.PlayerVaults [drtshock, Koalaaaa], EssentialsSpawn vTeamCity com.earth2me.essentials.spawn.EssentialsSpawn [Zenexer, ementalo, Aelux, Brettflan, KimKandor, snowleo, ceulemans, Xeology, KHobbits], Factions v2.8.2 com.massivecraft.factions.Factions [Cayorion, Brettflan], CombatLog v1.8.11-hack com.jackproehl.plugins.CombatLog [JackProehl, CraigEge, iiSnipez, KatsuroKurosaki],}
   Warnings: DEFAULT
   Reload Count: 0
   Threads: { RUNNABLE Netty Server IO #0: [sun.nio.ch.EPollArrayWrapper.epollWait(Native Method), sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269), sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:79), sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86), sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97), io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:622), io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:310), io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116), java.lang.Thread.run(Thread.java:745)], WAITING pool-5-thread-1: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.park(LockSupport.java:175), java.util.concurrent.locks.AbstractQueuedSynchronizer$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$Worker.run(ThreadPoolExecutor.java:617), java.lang.Thread.run(Thread.java:745)], TIMED_WAITING Keep-Alive-Timer: [java.lang.Thread.sleep(Native Method), sun.net.www.http.KeepAliveCache.run(KeepAliveCache.java:172), java.lang.Thread.run(Thread.java:745)], TIMED_WAITING Spigot Watchdog Thread: [java.lang.Thread.sleep(Native Method), org.spigotmc.WatchdogThread.run(WatchdogThread.java:92)], RUNNABLE Server thread: [java.lang.Thread.dumpThreads(Native Method), java.lang.Thread.getAllStackTraces(Thread.java:1603), org.bukkit.craftbukkit.v1_8_R3.CraftCrashReport.call(CraftCrashReport.java:29), net.minecraft.server.v1_8_R3.CrashReportSystemDetails.a(SourceFile:78), net.minecraft.server.v1_8_R3.CrashReport.h(CrashReport.java:127), net.minecraft.server.v1_8_R3.CrashReport.<init>(CrashReport.java:34), net.minecraft.server.v1_8_R3.CrashReport.a(CrashReport.java:312), net.minecraft.server.v1_8_R3.World.tickEntities(World.java:1428), net.minecraft.server.v1_8_R3.WorldServer.tickEntities(WorldServer.java:597), net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:786), net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374), net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654), net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557), java.lang.Thread.run(Thread.java:745)], TIMED_WAITING Craft Scheduler Thread - 30: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215), java.util.concurrent.SynchronousQueue$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 Netty Server IO #3: [java.util.zip.Deflater.deflateBytes(Native Method), java.util.zip.Deflater.deflate(Deflater.java:442), java.util.zip.Deflater.deflate(Deflater.java:383), net.minecraft.server.v1_8_R3.PacketCompressor.a(SourceFile:36), net.minecraft.server.v1_8_R3.PacketCompressor.encode(SourceFile:9), io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:107), io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:658), io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:716), io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:651), io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:113), io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:658), io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:716), io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:706), io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:741), io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:895), io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:240), net.minecraft.server.v1_8_R3.NetworkManager$4.run(NetworkManager.java:198), io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:380), io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:357), io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116), java.lang.Thread.run(Thread.java:745)], RUNNABLE DestroyJavaVM: [], TIMED_WAITING process reaper: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215), java.util.concurrent.SynchronousQueue$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)], WAITING Reference Handler: [java.lang.Object.wait(Native Method), java.lang.Object.wait(Object.java:502), java.lang.ref.Reference$ReferenceHandler.run(Reference.java:157)], 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_8_R3.DedicatedServer$2.run(DedicatedServer.java:79)], TIMED_WAITING Spigot Metrics Thread: [java.lang.Object.wait(Native Method), java.util.TimerThread.mainLoop(Timer.java:552), java.util.TimerThread.run(Timer.java:505)], WAITING Finalizer: [java.lang.Object.wait(Native Method), java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143), java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164), java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)], TIMED_WAITING Timer-0: [java.lang.Object.wait(Native Method), java.util.TimerThread.mainLoop(Timer.java:552), java.util.TimerThread.run(Timer.java:505)], RUNNABLE Signal Dispatcher: [], WAITING Chunk I/O Executor Thread-1: [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)], TIMED_WAITING Snooper Timer: [java.lang.Object.wait(Native Method), java.util.TimerThread.mainLoop(Timer.java:552), java.util.TimerThread.run(Timer.java:505)], TIMED_WAITING Craft Scheduler Thread - 29: [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)], TIMED_WAITING Server Infinisleeper: [java.lang.Thread.sleep(Native Method), net.minecraft.server.v1_8_R3.DedicatedServer$1.run(DedicatedServer.java:54)], TIMED_WAITING pool-4-thread-1: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215), java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078), java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093), java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809), 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)], TIMED_WAITING File IO Thread: [java.lang.Thread.sleep(Native Method), net.minecraft.server.v1_8_R3.FileIOThread.c(FileIOThread.java:52), net.minecraft.server.v1_8_R3.FileIOThread.run(FileIOThread.java:28), java.lang.Thread.run(Thread.java:745)], RUNNABLE Netty Server IO #2: [sun.nio.ch.EPollArrayWrapper.epollWait(Native Method), sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269), sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:79), sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86), sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97), io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:622), io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:310), io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116), java.lang.Thread.run(Thread.java:745)], TIMED_WAITING Craft Scheduler Thread - 19: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215), java.util.concurrent.SynchronousQueue$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)], 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_8_R3.util.TerminalConsoleWriterThread.run(TerminalConsoleWriterThread.java:25), java.lang.Thread.run(Thread.java:745)], TIMED_WAITING MStore ExamineThread: [java.lang.Thread.sleep(Native Method), com.massivecraft.massivecore.store.ExamineThread.run(ExamineThread.java:55)], RUNNABLE Netty Server IO #1: [sun.nio.ch.EPollArrayWrapper.epollWait(Native Method), sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:269), sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:79), sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:86), sun.nio.ch.SelectorImpl.select(SelectorImpl.java:97), io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:622), io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:310), io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116), java.lang.Thread.run(Thread.java:745)], 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 26841-26871{MythicMobs:net.elseland.xikage.MythicMobs.Clock.MythicMobsAsyncClock@26872,MythicMobs:net.elseland.xikage.MythicMobs.Clock.MythicMobsAsyncClock@26875,MythicMobs:net.elseland.xikage.MythicMobs.Clock.MythicMobsAsyncClock@26878,MythicMobs:net.elseland.xikage.MythicMobs.Clock.MythicMobsAsyncClock@26881,Essentials:com.earth2me.essentials.EssentialsPlayerListener$1@26884,Essentials:com.earth2me.essentials.spawn.EssentialsSpawnPlayerListener$1@26884,PlayerVaults:com.drtshock.playervaults.listeners.VaultPreloadListener$1@26884,MythicMobs:net.elseland.xikage.MythicMobs.Clock.MythicMobsAsyncClock@26884,ObsidianBreaker:com.creeperevents.oggehej.obsidianbreaker.ObsidianBreaker$CrackRunnable@26884,GlobalMarket:com.survivorserver.GlobalMarket.UpdateCheck@26884,MythicMobs:net.elseland.xikage.MythicMobs.Clock.MythicMobsAsyncClock@26887,MythicMobs:net.elseland.xikage.MythicMobs.Clock.MythicMobsAsyncClock@26890,MythicMobs:net.elseland.xikage.MythicMobs.Clock.MythicMobsAsyncClock@26893,MythicMobs:net.elseland.xikage.MythicMobs.Clock.MythicMobsAsyncClock@26896,MythicMobs:net.elseland.xikage.MythicMobs.Clock.MythicMobsAsyncClock@26899,}
    Profiler Position: N/A (disabled)
    Player Count: 1 / 20; [EntityPlayer['P_Squidy'/168, l='world', x=893.39, y=72.28, z=-47.25](P_Squidy at 893.3909232962939,72.27882171170363,-47.24844309254121)]
    Is Modded: Definitely; Server brand changed to 'Spigot'
    Type: Dedicated Server (map_server.txt)

 

Don't use mythicmobs. There's a lot of problems with it. This one useally happens because one of the mobs AI (starving canine's if you want to be precise) is misconfigured. Either delete that mob or the whole plugin.

I literally googled the first two lines on google, you should try this sometimes too.

 

@mcdorli, agreed on mythic mobs. Extremely unstable plugin that does not by any means handle error checking correctly.