I was playing on my server with my brother and then the server did randomly close without me typing /stop or something

FULL CRASH REPORT:

---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 26/07/14 15:56
Description: Watching Server

java.lang.Error
at java.util.HashMap.<init>(Unknown Source)
at java.util.HashMap.<init>(Unknown Source)
at java.util.HashSet.<init>(Unknown Source)
at com.google.common.collect.Sets.newHashSetWithExpectedSize(Sets.java:201)
at com.google.common.collect.HashMultimap.createCollection(HashMultimap.java:114)
at com.google.common.collect.HashMultimap.createCollection(HashMultimap.java:49)
at com.google.common.collect.AbstractMapBasedMultimap.createCollection(AbstractMapBasedMultimap.java:169)
at com.google.common.collect.AbstractMapBasedMultimap.get(AbstractMapBasedMultimap.java:306)
at com.google.common.collect.AbstractSetMultimap.get(AbstractSetMultimap.java:63)
at com.google.common.collect.HashMultimap.get(HashMultimap.java:49)
at com.google.common.collect.AbstractSetMultimap.get(AbstractSetMultimap.java:34)
at ws.iterator(SourceFile:99)
at bed.a(SourceFile:763)
at aqa.a(SourceFile:2224)
at aqa.b(SourceFile:2212)
at aqa.a(SourceFile:977)
at wk.d(SourceFile:493)
at xh.g(SourceFile:1216)
at xh.l(SourceFile:1459)
at xi.l(SourceFile:327)
at aex.l(SourceFile:39)
at xh.j(SourceFile:1299)
at xi.j(SourceFile:206)
at aex.j(SourceFile:44)
at aea.j(SourceFile:141)
at aqa.a(SourceFile:1410)
at ql.a(SourceFile:592)
at aqa.g(SourceFile:1388)
at aqa.i(SourceFile:1281)
at ql.i(SourceFile:470)
at net.minecraft.server.MinecraftServer.y(SourceFile:605)
at ph.y(SourceFile:303)
at net.minecraft.server.MinecraftServer.x(SourceFile:529)
at net.minecraft.server.MinecraftServer.run(SourceFile:445)
at java.lang.Thread.run(Unknown Source)

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

– Head –
Stacktrace:
at java.util.HashMap.<init>(Unknown Source)
at java.util.HashMap.<init>(Unknown Source)
at java.util.HashSet.<init>(Unknown Source)
at com.google.common.collect.Sets.newHashSetWithExpectedSize(Sets.java:201)
at com.google.common.collect.HashMultimap.createCollection(HashMultimap.java:114)
at com.google.common.collect.HashMultimap.createCollection(HashMultimap.java:49)
at com.google.common.collect.AbstractMapBasedMultimap.createCollection(AbstractMapBasedMultimap.java:169)
at com.google.common.collect.AbstractMapBasedMultimap.get(AbstractMapBasedMultimap.java:306)
at com.google.common.collect.AbstractSetMultimap.get(AbstractSetMultimap.java:63)
at com.google.common.collect.HashMultimap.get(HashMultimap.java:49)
at com.google.common.collect.AbstractSetMultimap.get(AbstractSetMultimap.java:34)
at ws.iterator(SourceFile:99)
at bed.a(SourceFile:763)
at aqa.a(SourceFile:2224)
at aqa.b(SourceFile:2212)
at aqa.a(SourceFile:977)
at wk.d(SourceFile:493)
at xh.g(SourceFile:1216)
at xh.l(SourceFile:1459)
at xi.l(SourceFile:327)
at aex.l(SourceFile:39)
at xh.j(SourceFile:1299)
at xi.j(SourceFile:206)
at aex.j(SourceFile:44)
at aea.j(SourceFile:141)
at aqa.a(SourceFile:1410)
at ql.a(SourceFile:592)
at aqa.g(SourceFile:1388)
at aqa.i(SourceFile:1281)
at ql.i(SourceFile:470)
at net.minecraft.server.MinecraftServer.y(SourceFile:605)
at ph.y(SourceFile:303)
at net.minecraft.server.MinecraftServer.x(SourceFile:529)

– Thread Dump –
Details:
Threads: "Netty Server IO #3" Id=28 RUNNABLE (in native)
at sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method)
at sun.nio.ch.WindowsSelectorImpl$SubSelector.poll(Unknown Source)
at sun.nio.ch.WindowsSelectorImpl$SubSelector.access$400(Unknown Source)
at sun.nio.ch.WindowsSelectorImpl.doSelect(Unknown Source)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)

• locked io.netty.channel.nio.SelectedSelectionKeySet@340ca5
• locked java.util.Collections$UnmodifiableSet@80986b
• locked sun.nio.ch.WindowsSelectorImpl@2808b1
  at sun.nio.ch.SelectorImpl.select(Unknown Source)
  at io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:618)
  at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:306)
  ...

"Netty Server IO #2" Id=27 RUNNABLE (in native)
at sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method)
at sun.nio.ch.WindowsSelectorImpl$SubSelector.poll(Unknown Source)
at sun.nio.ch.WindowsSelectorImpl$SubSelector.access$400(Unknown Source)
at sun.nio.ch.WindowsSelectorImpl.doSelect(Unknown Source)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)

• locked io.netty.channel.nio.SelectedSelectionKeySet@1cb5144
• locked java.util.Collections$UnmodifiableSet@a0c77e
• locked sun.nio.ch.WindowsSelectorImpl@6f9a4c
  at sun.nio.ch.SelectorImpl.select(Unknown Source)
  at io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:618)
  at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:306)
  ...

"Netty Server IO #1" Id=26 RUNNABLE (in native)
at sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method)
at sun.nio.ch.WindowsSelectorImpl$SubSelector.poll(Unknown Source)
at sun.nio.ch.WindowsSelectorImpl$SubSelector.access$400(Unknown Source)
at sun.nio.ch.WindowsSelectorImpl.doSelect(Unknown Source)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)

• locked io.netty.channel.nio.SelectedSelectionKeySet@8df6ee
• locked java.util.Collections$UnmodifiableSet@aa3eb3
• locked sun.nio.ch.WindowsSelectorImpl@1595754
  at sun.nio.ch.SelectorImpl.select(Unknown Source)
  at io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:618)
  at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:306)
  ...

"File IO Thread" Id=33 TIMED_WAITING
at java.lang.Thread.sleep(Native Method)
at bqk.c(SourceFile:44)
at bqk.run(SourceFile:30)
at java.lang.Thread.run(Unknown Source)

"Server Watchdog" Id=31 RUNNABLE
at sun.management.ThreadImpl.dumpThreads0(Native Method)
at sun.management.ThreadImpl.dumpAllThreads(Unknown Source)
at pm.run(SourceFile:36)
at java.lang.Thread.run(Unknown Source)

"Netty Server IO #0" Id=25 RUNNABLE
at sun.nio.ch.WindowsSelectorImpl$SubSelector.poll0(Native Method)
at sun.nio.ch.WindowsSelectorImpl$SubSelector.poll(Unknown Source)
at sun.nio.ch.WindowsSelectorImpl$SubSelector.access$400(Unknown Source)
at sun.nio.ch.WindowsSelectorImpl.doSelect(Unknown Source)
at sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)

• locked io.netty.channel.nio.SelectedSelectionKeySet@1993415
• locked java.util.Collections$UnmodifiableSet@a20b99
• locked sun.nio.ch.WindowsSelectorImpl@194032a
  at sun.nio.ch.SelectorImpl.select(Unknown Source)
  at io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:618)
  at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:306)
  ...

"DestroyJavaVM" Id=22 RUNNABLE

"Server thread" Id=20 RUNNABLE
at java.util.HashMap.<init>(Unknown Source)
at java.util.HashMap.<init>(Unknown Source)
at java.util.HashSet.<init>(Unknown Source)
at com.google.common.collect.Sets.newHashSetWithExpectedSize(Sets.java:201)
at com.google.common.collect.HashMultimap.createCollection(HashMultimap.java:114)
at com.google.common.collect.HashMultimap.createCollection(HashMultimap.java:49)
at com.google.common.collect.AbstractMapBasedMultimap.createCollection(AbstractMapBasedMultimap.java:169)
at com.google.common.collect.AbstractMapBasedMultimap.get(AbstractMapBasedMultimap.java:306)
...

"TimerQueue" Id=18 TIMED_WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@1f2eba4
at sun.misc.Unsafe.park(Native Method)

• waiting on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@1f2eba4
  at java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(Unknown Source)
  at java.util.concurrent.DelayQueue.take(Unknown Source)
  at javax.swing.TimerQueue.run(Unknown Source)
  at java.lang.Thread.run(Unknown Source)

Number of locked synchronizers = 1

• java.util.concurrent.locks.ReentrantLock$NonfairSync@5be858

"Thread-4" Id=17 WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@14c738d
at sun.misc.Unsafe.park(Native Method)

• waiting on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@14c738d
  at java.util.concurrent.locks.LockSupport.park(Unknown Source)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
  at java.util.concurrent.LinkedBlockingQueue.take(Unknown Source)
  at com.mojang.util.QueueLogAppender.getNextLogEvent(QueueLogAppender.java:77)
  at ps.run(SourceFile:114)
  at java.lang.Thread.run(Unknown Source)

"AWT-EventQueue-0" Id=16 WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@364223
at sun.misc.Unsafe.park(Native Method)

• waiting on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@364223
  at java.util.concurrent.locks.LockSupport.park(Unknown Source)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
  at java.awt.EventQueue.getNextEvent(Unknown Source)
  at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
  at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
  at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
  at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
  ...

"AWT-Windows" Id=14 RUNNABLE (in native)
at sun.awt.windows.WToolkit.eventLoop(Native Method)
at sun.awt.windows.WToolkit.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

"AWT-Shutdown" Id=13 WAITING on java.lang.Object@300e18
at java.lang.Object.wait(Native Method)

• waiting on java.lang.Object@300e18
  at java.lang.Object.wait(Object.java:503)
  at sun.awt.AWTAutoShutdown.run(Unknown Source)
  at java.lang.Thread.run(Unknown Source)

"Java2D Disposer" Id=12 WAITING on java.lang.ref.ReferenceQueue$Lock@ed698d
at java.lang.Object.wait(Native Method)

• waiting on java.lang.ref.ReferenceQueue$Lock@ed698d
  at java.lang.ref.ReferenceQueue.remove(Unknown Source)
  at java.lang.ref.ReferenceQueue.remove(Unknown Source)
  at sun.java2d.Disposer.run(Unknown Source)
  at java.lang.Thread.run(Unknown Source)

"Server Infinisleeper" Id=11 TIMED_WAITING
at java.lang.Thread.sleep(Native Method)
at pi.run(SourceFile:64)

"Snooper Timer" Id=10 TIMED_WAITING on java.util.TaskQueue@accb55
at java.lang.Object.wait(Native Method)

• waiting on java.util.TaskQueue@accb55
  at java.util.TimerThread.mainLoop(Unknown Source)
  at java.util.TimerThread.run(Unknown Source)

"Attach Listener" Id=5 RUNNABLE

"Signal Dispatcher" Id=4 RUNNABLE

"Finalizer" Id=3 WAITING on java.lang.ref.ReferenceQueue$Lock@595998
at java.lang.Object.wait(Native Method)

• waiting on java.lang.ref.ReferenceQueue$Lock@595998
  at java.lang.ref.ReferenceQueue.remove(Unknown Source)
  at java.lang.ref.ReferenceQueue.remove(Unknown Source)
  at java.lang.ref.Finalizer$FinalizerThread.run(Unknown Source)

"Reference Handler" Id=2 WAITING on java.lang.ref.Reference$Lock@92c2f
at java.lang.Object.wait(Native Method)

• waiting on java.lang.ref.Reference$Lock@92c2f
  at java.lang.Object.wait(Object.java:503)
  at java.lang.ref.Reference$ReferenceHandler.run(Unknown Source)

Stacktrace:
at pm.run(SourceFile:52)
at java.lang.Thread.run(Unknown Source)

– System Details –
Details:
Minecraft Version: 14w30c
Operating System: Windows Vista (x86) version 6.0
Java Version: 1.7.0_65, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 77025976 bytes (73 MB) / 259522560 bytes (247 MB) up to 259522560 bytes (247 MB)
JVM Flags: 0 total;
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Profiler Position: N/A (disabled)
Player Count: 2 / 20; [qo['Hansdekip'/260, l='Survival', x=-349,50, y=94,00, z=-61,84], qo['mat_321'/52278, l='Survival', x=-421,83, y=69,00, z=163,86]]
Is Modded: Unknown (can't tell)
Type: Dedicated Server (map_server.txt)