Solved Console Error "Exception in server tick loop"

Hello, I am a server manager, and only one of our servers seems to be receiving this error. It would be greatly appreciated if anyone could help me solve this error code. Thank you in advance!

Code (text):

---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 12/17/13 11:34 PM
Description: Exception in server tick loop

java.lang.IllegalArgumentException: n must be positive
    at java.util.Random.nextInt(Unknown Source)
    at net.minecraft.server.v1_7_R1.BiomeDecorator.a(SourceFile:122)
    at net.minecraft.server.v1_7_R1.BiomeDecorator.a(SourceFile:27)
    at net.minecraft.server.v1_7_R1.BiomeBase.a(SourceFile:362)
    at net.minecraft.server.v1_7_R1.BiomeForest.a(SourceFile:138)
    at net.minecraft.server.v1_7_R1.ChunkProviderGenerate.getChunkAt(SourceFile:432)
    at org.bukkit.craftbukkit.v1_7_R1.generator.NormalChunkGenerator.getChunkAt(NormalChunkGenerator.java:49)
    at net.minecraft.server.v1_7_R1.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:230)
    at net.minecraft.server.v1_7_R1.Chunk.a(Chunk.java:880)
    at org.bukkit.craftbukkit.v1_7_R1.chunkio.ChunkIOProvider.callStage2(ChunkIOProvider.java:61)
    at org.bukkit.craftbukkit.v1_7_R1.chunkio.ChunkIOProvider.callStage2(ChunkIOProvider.java:13)
    at org.bukkit.craftbukkit.v1_7_R1.util.AsynchronousExecutor$Task.finish(AsynchronousExecutor.java:179)
    at org.bukkit.craftbukkit.v1_7_R1.util.AsynchronousExecutor.finishActive(AsynchronousExecutor.java:287)
    at org.bukkit.craftbukkit.v1_7_R1.chunkio.ChunkIOExecutor.tick(ChunkIOExecutor.java:30)
    at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:586)
    at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:259)
    at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:534)
    at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:446)
    at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617)

Can you give us more information? http://www.lilypadmc.org/threads/read-me-what-you-need-to-know-before-posting.353/

My apologies. Whenever anyone joins the hub server, the server crashes almost immediately. The version of SPIGOT that we use is "[09:40:40 INFO]: This server is running CraftBukkit version git-Spigot-1192 (MC: 1.7.2) (Implementing API version 1.7.2-R0.1-SNAPSHOT)"
The rest of this report is here, since it wouldn't let me post more than 10,000 characters:

Code (text):

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

-- System Details --
Details:
    Minecraft Version: 1.7.2
    Operating System: Windows Server 2012 (amd64) version 6.2
    Java Version: 1.7.0_45, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 31677467640 bytes (30209 MB) / 32928956416 bytes (31403 MB) up to 32928956416 bytes (31403 MB)
    JVM Flags: 2 total; -Xmx32768M -Xms32768M
    AABB Pool Size: 497 (27832 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
    IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
    CraftBukkit Information:
  Running: CraftBukkit version git-Spigot-1192 (MC: 1.7.2) (Implementing API version 1.7.2-R0.1-SNAPSHOT) false
  Plugins: { WorldEdit v5.5.9-SNAPSHOT:2847-9a000de,master com.sk89q.worldedit.bukkit.WorldEditPlugin [], Buycraft v6.4 net.buycraft.Plugin [Tebex Technologies Ltd], Launchpads v1.0.0 me.samthelord1.launchpads.Main [samthelord1], LilyPad-Connect v50 lilypad.bukkit.connect.ConnectPlugin [LilyPad], Vault v1.2.27-b349 net.milkbowl.vault.Vault [cereal, Sleaker, mung3r], Trails v2.43 com.playertrails.PlayerTrails [sothatsit], ProtocolLib v3.0.0-SNAPSHOT com.comphenix.protocol.ProtocolLibrary [Comphenix], PermissionsEx v1.20.4 ru.tehkode.permissions.bukkit.PermissionsEx [[t3hk0d3, zml]], Multiverse-Core v2.4-b527 com.onarandombox.MultiverseCore.MultiverseCore [Rigby, fernferret, lithium3141, main--], LilyPad-Portal v19 lilypad.bukkit.portal.PortalPlugin [LilyPad], DeadFrog v2.0 gg.mc.deadfrog.DeadFrog [dreadiscool], EmptyWorldGenerator v1.2 com.barancode.mc.MainClass [], EchoPet v2.2.1 io.github.dsh105.echopet.EchoPet [DSH105], WorldGuard v5.8 com.sk89q.worldguard.bukkit.WorldGuardPlugin [], TrophyHeads v1.12.6 com.cnaude.trophyheads.TrophyHeads [cnaude], FreezeTime v0.2 com.github.awolk.FreezeTime.FreezeTime [], Essentials vPre2.12.2.1 com.earth2me.essentials.Essentials [Zenexer, ementalo, Aelux, Brettflan, KimKandor, snowleo, ceulemans, Xeology, KHobbits, md_5, Iaccidentally], LilyPad-PortalCommand v10 lilypad.bukkit.portal.command.CommandPlugin [LilyPad], EssentialsSpawn vPre2.12.2.1 com.earth2me.essentials.spawn.EssentialsSpawn [Zenexer, ementalo, Aelux, Brettflan, KimKandor, snowleo, ceulemans, Xeology, KHobbits], TagAPI v2.7.1 org.kitteh.tag.TagAPI [mbaxter], EssentialsGeoIP vPre2.12.2.1 com.earth2me.essentials.geoip.EssentialsGeoIP [Zenexer, ementalo, Aelux, Brettflan, KimKandor, snowleo, ceulemans, Xeology], BKCommonLib v1.56 com.bergerkiller.bukkit.common.internal.CommonPlugin [bergerkiller, lenis0012], EssentialsChat vPre2.12.2.1 com.earth2me.essentials.chat.EssentialsChat [Zenexer, ementalo, Aelux, Brettflan, KimKandor, snowleo, ceulemans, Xeology, KHobbits, md_5, Okamosy, Iaccidentally],}
  Warnings: DEFAULT
  Threads: { TIMED_WAITING connect-thread: [java.lang.Thread.sleep(Native Method), lilypad.bukkit.connect.ConnectThread.run(ConnectThread.java:139), java.lang.Thread.run(Unknown Source)], RUNNABLE Server console handler: [org.fusesource.jansi.internal.Kernel32._getch(Native Method), org.fusesource.jansi.internal.WindowsSupport.readByte(WindowsSupport.java:46), org.bukkit.craftbukkit.libs.jline.WindowsTerminal.readByte(WindowsTerminal.java:184), org.bukkit.craftbukkit.libs.jline.WindowsTerminal.access$000(WindowsTerminal.java:53), org.bukkit.craftbukkit.libs.jline.WindowsTerminal$1.read(WindowsTerminal.java:151), java.io.FilterInputStream.read(Unknown Source), org.bukkit.craftbukkit.libs.jline.console.ConsoleReader$1.read(ConsoleReader.java:167), org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:267), org.bukkit.craftbukkit.libs.jline.internal.InputStreamReader.read(InputStreamReader.java:204), org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.readCharacter(ConsoleReader.java:995), org.bukkit.craftbukkit.libs.jline.console.ConsoleReader.readLine(ConsoleReader.java:1167), net.minecraft.server.v1_7_R1.ThreadCommandReader.run(ThreadCommandReader.java:32)], RUNNABLE Signal Dispatcher: [], RUNNABLE nioEventLoopGroup-2-1: [sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method), sun.nio.ch.WindowsSelectorImpl$SubSelector.poll(Unknown Source), sun.nio.ch.WindowsSelectorImpl$SubSelector.access$400(Unknown Source), sun.nio.ch.WindowsSelectorImpl.doSelect(Unknown Source), sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source), sun.nio.ch.SelectorImpl.select(Unknown Source), lilypad.libs.io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:596), lilypad.libs.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:306), lilypad.libs.io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101), java.lang.Thread.run(Unknown Source)], TIMED_WAITING Spigot Watchdog Thread: [java.lang.Thread.sleep(Native Method), org.spigotmc.WatchdogThread.run(WatchdogThread.java:85)], RUNNABLE Netty IO #2: [sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method), sun.nio.ch.WindowsSelectorImpl$SubSelector.poll(Unknown Source), sun.nio.ch.WindowsSelectorImpl$SubSelector.access$400(Unknown Source), sun.nio.ch.WindowsSelectorImpl.doSelect(Unknown Source), sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source), sun.nio.ch.SelectorImpl.select(Unknown Source), net.minecraft.util.io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:591), net.minecraft.util.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:301), net.minecraft.util.io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101), java.lang.Thread.run(Unknown Source)], WAITING pool-6-thread-1: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.park(Unknown Source), java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source), java.util.concurrent.LinkedBlockingQueue.take(Unknown Source), java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source), java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source), java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source), java.lang.Thread.run(Unknown Source)], WAITING pool-7-thread-1: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.park(Unknown Source), java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source), java.util.concurrent.LinkedBlockingQueue.take(Unknown Source), java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source), java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source), java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source), java.lang.Thread.run(Unknown Source)], WAITING PermissionsEx-Cleaner: [java.lang.Object.wait(Native Method), java.lang.Object.wait(Object.java:503), java.util.TimerThread.mainLoop(Unknown Source), java.util.TimerThread.run(Unknown Source)], RUNNABLE DestroyJavaVM: [], WAITING Chunk I/O Executor Thread-1: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.park(Unknown Source), java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source), java.util.concurrent.LinkedBlockingQueue.take(Unknown Source), java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source), java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source), java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source), java.lang.Thread.run(Unknown Source)], RUNNABLE Server thread: [java.lang.Thread.dumpThreads(Native Method), java.lang.Thread.getAllStackTraces(Unknown Source), org.bukkit.craftbukkit.v1_7_R1.CraftCrashReport.call(CraftCrashReport.java:28), net.minecraft.server.v1_7_R1.CrashReportSystemDetails.a(SourceFile:74), net.minecraft.server.v1_7_R1.CrashReport.h(CrashReport.java:45), net.minecraft.server.v1_7_R1.CrashReport.<init>(CrashReport.java:33), net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:462), net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617)], TIMED_WAITING Snooper Timer: [java.lang.Object.wait(Native
 

Third Part:

Code (text):

Method), java.util.TimerThread.mainLoop(Unknown Source), java.util.TimerThread.run(Unknown Source)], WAITING pool-6-thread-3: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.park(Unknown Source), java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source), java.util.concurrent.LinkedBlockingQueue.take(Unknown Source), java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source), java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source), java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source), java.lang.Thread.run(Unknown Source)], TIMED_WAITING Server Infinisleeper: [java.lang.Thread.sleep(Native Method), net.minecraft.server.v1_7_R1.ThreadSleepForever.run(SourceFile:62)], TIMED_WAITING Craft Scheduler Thread - 10: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source), java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(Unknown Source), java.util.concurrent.SynchronousQueue$TransferStack.transfer(Unknown Source), java.util.concurrent.SynchronousQueue.poll(Unknown Source), java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source), java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source), java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source), java.lang.Thread.run(Unknown Source)], TIMED_WAITING Craft Scheduler Thread - 0: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source), java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(Unknown Source), java.util.concurrent.SynchronousQueue$TransferStack.transfer(Unknown Source), java.util.concurrent.SynchronousQueue.poll(Unknown Source), java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source), java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source), java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source), java.lang.Thread.run(Unknown Source)], WAITING pool-6-thread-4: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.park(Unknown Source), java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source), java.util.concurrent.LinkedBlockingQueue.take(Unknown Source), java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source), java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source), java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source), java.lang.Thread.run(Unknown Source)], RUNNABLE Thread-5: [java.io.FileOutputStream.writeBytes(Native Method), java.io.FileOutputStream.write(Unknown Source), java.io.BufferedOutputStream.flushBuffer(Unknown Source), java.io.BufferedOutputStream.flush(Unknown Source), java.io.PrintStream.write(Unknown Source), org.fusesource.jansi.AnsiOutputStream.write(AnsiOutputStream.java:82), java.io.FilterOutputStream.write(Unknown Source), java.io.PrintStream.write(Unknown Source), java.io.FilterOutputStream.write(Unknown Source), org.bukkit.craftbukkit.v1_7_R1.util.TerminalConsoleWriterThread.run(TerminalConsoleWriterThread.java:34), java.lang.Thread.run(Unknown Source)], RUNNABLE Netty IO #0: [sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method), sun.nio.ch.WindowsSelectorImpl$SubSelector.poll(Unknown Source), sun.nio.ch.WindowsSelectorImpl$SubSelector.access$400(Unknown Source), sun.nio.ch.WindowsSelectorImpl.doSelect(Unknown Source), sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source), sun.nio.ch.SelectorImpl.select(Unknown Source), net.minecraft.util.io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:591), net.minecraft.util.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:301), net.minecraft.util.io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101), java.lang.Thread.run(Unknown Source)], TIMED_WAITING Spigot Metrics Thread: [java.lang.Object.wait(Native Method), java.util.TimerThread.mainLoop(Unknown Source), java.util.TimerThread.run(Unknown Source)], WAITING pool-6-thread-5: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.park(Unknown Source), java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source), java.util.concurrent.LinkedBlockingQueue.take(Unknown Source), java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source), java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source), java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source), java.lang.Thread.run(Unknown Source)], WAITING pool-6-thread-2: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.park(Unknown Source), java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source), java.util.concurrent.LinkedBlockingQueue.take(Unknown Source), java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source), java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source), java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source), java.lang.Thread.run(Unknown Source)], RUNNABLE Attach Listener: [], WAITING Reference Handler: [java.lang.Object.wait(Native Method), java.lang.Object.wait(Object.java:503), java.lang.ref.Reference$ReferenceHandler.run(Unknown Source)], TIMED_WAITING File IO Thread: [java.lang.Thread.sleep(Native Method), net.minecraft.server.v1_7_R1.FileIOThread.b(SourceFile:44), net.minecraft.server.v1_7_R1.FileIOThread.run(SourceFile:23), java.lang.Thread.run(Unknown Source)], RUNNABLE Netty IO #1: [net.minecraft.util.io.netty.channel.DefaultChannelConfig.isAutoRead(DefaultChannelConfig.java:250), net.minecraft.util.io.netty.channel.DefaultChannelPipeline.fireChannelReadComplete(DefaultChannelPipeline.java:792), net.minecraft.util.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:118), net.minecraft.util.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:480), net.minecraft.util.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:447), net.minecraft.util.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:341), net.minecraft.util.io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101), java.lang.Thread.run(Unknown Source)], WAITING Finalizer: [java.lang.Object.wait(Native Method), java.lang.ref.ReferenceQueue.remove(Unknown Source), java.lang.ref.ReferenceQueue.remove(Unknown Source), java.lang.ref.Finalizer$FinalizerThread.run(Unknown Source)], TIMED_WAITING Craft Scheduler Thread - 11: [sun.misc.Unsafe.park(Native Method), java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source), java.util.concurrent.SynchronousQueue$TransferStack.awaitFulfill(Unknown Source), java.util.concurrent.SynchronousQueue$TransferStack.transfer(Unknown Source), java.util.concurrent.SynchronousQueue.poll(Unknown Source), java.util.concurrent.ThreadPoolExecutor.getTask(Unknown Source), java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source), java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source), java.lang.Thread.run(Unknown Source)],}
  Recent tasks from 3146-3176{WorldEdit:com.sk89q.worldedit.bukkit.SessionTimer@3149,}
    Profiler Position: N/A (disabled)
    Vec3 Pool Size: ~~ERROR~~ NullPointerException: null
    Player Count: 3 / 150; [EntityPlayer['Th3MasterMind'/234, l='huby', x=118.93, y=160.85, z=114.86](Th3MasterMind at 118.93405416886995,160.84687715606543,114.85764500786804), EntityPlayer['KenzieRiann'/243, l='huby', x=122.74, y=158.79, z=123.87](KenzieRiann at 122.73808625220846,158.78718400556454,123.86552786527352), EntityPlayer['Stormsx4'/506, l='huby', x=133.55, y=145.93, z=162.07](Stormsx4 at 133.5451508172635,145.92792474039638,162.07187497239568)]
    Is Modded: Definitely; Server brand changed to 'craftbukkit'
    Type: Dedicated Server (map_server.txt)