What is the problem with my server, he's crash all time with lag.
This is the crash report:

---- Minecraft Crash Report ----
// Who set us up the TNT?

Time: 15-8-15 18:14
Description: Watching Server

java.lang.Error
at java.lang.Thread.isInterrupted(Native Method)
at java.lang.Thread.interrupted(Unknown Source)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(Unknown Source)
at com.google.common.util.concurrent.AbstractFuture$Sync.get(AbstractFuture.java:285)
at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:116)
at com.google.common.util.concurrent.Uninterruptibles.getUninterruptibly(Uninterruptibles.java:135)
at com.google.common.cache.LocalCache$Segment.getAndRecordStats(LocalCache.java:2346)
at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2318)
at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2280)
at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2195)
at com.google.common.cache.LocalCache.get(LocalCache.java:3934)
at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3938)
at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4821)
at com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:4827)
at apk.a(SourceFile:67)
at apk.a(SourceFile:90)
at ais.d(SourceFile:64)
at ais.d(SourceFile:60)
at aqf.a(SourceFile:551)
at agh.a(SourceFile:293)
at arz.b(SourceFile:38)
at agx.a(SourceFile:103)
at agx.a(SourceFile:49)
at agu.a(SourceFile:388)
at agz.a(SourceFile:29)
at ark.a(SourceFile:473)
at lj.a(SourceFile:170)
at aqf.a(SourceFile:875)
at lj.c(SourceFile:100)
at lh$a.<init>(SourceFile:39)
at lh.a(SourceFile:231)
at lh.d(SourceFile:370)
at md.d(SourceFile:294)
at ls.a(SourceFile:354)
at ip.a(SourceFile:126)
at ip$a.a(SourceFile:57)
at fh$1.run(SourceFile:13)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at g.a(SourceFile:45)
at net.minecraft.server.MinecraftServer.D(SourceFile:597)
at kt.D(SourceFile:299)
at net.minecraft.server.MinecraftServer.C(SourceFile:553)
at net.minecraft.server.MinecraftServer.run(SourceFile:457)
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.lang.Thread.isInterrupted(Native Method)
at java.lang.Thread.interrupted(Unknown Source)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(Unknown Source)
at com.google.common.util.concurrent.AbstractFuture$Sync.get(AbstractFuture.java:285)
at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:116)
at com.google.common.util.concurrent.Uninterruptibles.getUninterruptibly(Uninterruptibles.java:135)
at com.google.common.cache.LocalCache$Segment.getAndRecordStats(LocalCache.java:2346)
at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2318)
at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2280)
at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2195)
at com.google.common.cache.LocalCache.get(LocalCache.java:3934)
at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3938)
at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4821)
at com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:4827)
at apk.a(SourceFile:67)
at apk.a(SourceFile:90)
at ais.d(SourceFile:64)
at ais.d(SourceFile:60)
at aqf.a(SourceFile:551)
at agh.a(SourceFile:293)
at arz.b(SourceFile:38)
at agx.a(SourceFile:103)
at agx.a(SourceFile:49)
at agu.a(SourceFile:388)
at agz.a(SourceFile:29)
at ark.a(SourceFile:473)
at lj.a(SourceFile:170)
at aqf.a(SourceFile:875)
at lj.c(SourceFile:100)
at lh$a.<init>(SourceFile:39)
at lh.a(SourceFile:231)
at lh.d(SourceFile:370)
at md.d(SourceFile:294)
at ls.a(SourceFile:354)
at ip.a(SourceFile:126)
at ip$a.a(SourceFile:57)
at fh$1.run(SourceFile:13)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at g.a(SourceFile:45)
at net.minecraft.server.MinecraftServer.D(SourceFile:597)
at kt.D(SourceFile:299)
at net.minecraft.server.MinecraftServer.C(SourceFile:553)

– Thread Dump –
Details:
Threads: "File IO Thread" Id=40 TIMED_WAITING
at java.lang.Thread.sleep(Native Method)
at axw.c(SourceFile:51)
at axw.run(SourceFile:30)
at java.lang.Thread.run(Unknown Source)

"Server Watchdog" Id=35 RUNNABLE
at sun.management.ThreadImpl.dumpThreads0(Native Method)
at sun.management.ThreadImpl.dumpAllThreads(Unknown Source)
at ku.run(SourceFile:43)
at java.lang.Thread.run(Unknown Source)

"Netty Server IO #7" Id=33 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@194b375
• locked java.util.Collections$UnmodifiableSet@15358b7
• locked sun.nio.ch.WindowsSelectorImpl@16cd805
  at sun.nio.ch.SelectorImpl.select(Unknown Source)
  at io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:622)
  at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:310)
  ...

"Netty Server IO #6" Id=32 BLOCKED on java.util.ArrayDeque@6e528c owned by "Server thread" Id=20
at net.minecraft.server.MinecraftServer.a(SourceFile:1292)

• blocked on java.util.ArrayDeque@6e528c
  at net.minecraft.server.MinecraftServer.a(SourceFile:1309)
  at lk.a(SourceFile:1040)
  at fh.a(SourceFile:10)
  at ls.a(SourceFile:171)
  at ip.a(SourceFile:126)
  at ip$c.a(SourceFile:88)
  at ek.a(SourceFile:125)
  ...

"Netty Server IO #5" Id=31 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@694aaf
• locked java.util.Collections$UnmodifiableSet@14631b5
• locked sun.nio.ch.WindowsSelectorImpl@ab7728
  at sun.nio.ch.SelectorImpl.select(Unknown Source)
  at io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:622)
  at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:310)
  ...

"Netty Server IO #4" Id=30 BLOCKED on java.util.ArrayDeque@6e528c owned by "Server thread" Id=20
at net.minecraft.server.MinecraftServer.a(SourceFile:1292)

• blocked on java.util.ArrayDeque@6e528c
  at net.minecraft.server.MinecraftServer.a(SourceFile:1309)
  at lk.a(SourceFile:1040)
  at fh.a(SourceFile:10)
  at ls.a(SourceFile:171)
  at ip.a(SourceFile:126)
  at ip$a.a(SourceFile:57)
  at ek.a(SourceFile:125)
  ...

"Netty Server IO #3" Id=29 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@41adc3
• locked java.util.Collections$UnmodifiableSet@5db316
• locked sun.nio.ch.WindowsSelectorImpl@74f571
  at sun.nio.ch.SelectorImpl.select(Unknown Source)
  at io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:622)
  at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:310)
  ...

"Netty Server IO #2" 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@1afd860
• locked java.util.Collections$UnmodifiableSet@f5323
• locked sun.nio.ch.WindowsSelectorImpl@18595f7
  at sun.nio.ch.SelectorImpl.select(Unknown Source)
  at io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:622)
  at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:310)
  ...

"Netty Server IO #1" 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@bd3ecb
• locked java.util.Collections$UnmodifiableSet@1269fa4
• locked sun.nio.ch.WindowsSelectorImpl@1cc49e8
  at sun.nio.ch.SelectorImpl.select(Unknown Source)
  at io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:622)
  at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:310)
  ...

"Netty Server IO #0" 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@834a8b
• locked java.util.Collections$UnmodifiableSet@18f6f36
• locked sun.nio.ch.WindowsSelectorImpl@390bdc
  at sun.nio.ch.SelectorImpl.select(Unknown Source)
  at io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:622)
  at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:310)
  ...

"D3D Screen Updater" Id=24 TIMED_WAITING on java.lang.Object@1fd8c7a
at java.lang.Object.wait(Native Method)

• waiting on java.lang.Object@1fd8c7a
  at sun.java2d.d3d.D3DScreenUpdateManager.run(Unknown Source)
  at java.lang.Thread.run(Unknown Source)

"Server console handler" Id=23 RUNNABLE (in native)
at java.io.FileInputStream.readBytes(Native Method)
at java.io.FileInputStream.read(Unknown Source)
at java.io.BufferedInputStream.read1(Unknown Source)
at java.io.BufferedInputStream.read(Unknown Source)

• locked java.io.BufferedInputStream@1704c5c
  at sun.nio.cs.StreamDecoder.readBytes(Unknown Source)
  at sun.nio.cs.StreamDecoder.implRead(Unknown Source)
  at sun.nio.cs.StreamDecoder.read(Unknown Source)
• locked java.io.InputStreamReader@1fa6b5b
  at java.io.InputStreamReader.read(Unknown Source)
  ...

"DestroyJavaVM" Id=22 RUNNABLE

"Server thread" Id=20 RUNNABLE
at java.lang.Thread.isInterrupted(Native Method)
at java.lang.Thread.interrupted(Unknown Source)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(Unknown Source)
at com.google.common.util.concurrent.AbstractFuture$Sync.get(AbstractFuture.java:285)
at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:116)
at com.google.common.util.concurrent.Uninterruptibles.getUninterruptibly(Uninterruptibles.java:135)
at com.google.common.cache.LocalCache$Segment.getAndRecordStats(LocalCache.java:2346)
at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2318)
...

"TimerQueue" Id=18 TIMED_WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@18782ee
at sun.misc.Unsafe.park(Native Method)

• waiting on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@18782ee
  at java.util.concurrent.locks.LockSupport.parkNanos(Unknown Source)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer$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@603112

"Thread-4" Id=17 WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@1ff82b6
at sun.misc.Unsafe.park(Native Method)

• waiting on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@1ff82b6
  at java.util.concurrent.locks.LockSupport.park(Unknown Source)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(Unknown Source)
  at java.util.concurrent.LinkedBlockingQueue.take(Unknown Source)
  at com.mojang.util.QueueLogAppender.getNextLogEvent(QueueLogAppender.java:77)
  at kw$4.run(SourceFile:114)
  at java.lang.Thread.run(Unknown Source)

"AWT-EventQueue-0" Id=16 RUNNABLE
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at javax.swing.RepaintManager.validateInvalidComponents(Unknown Source)
at javax.swing.RepaintManager$ProcessingRunnable.run(Unknown Source)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(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@1a6fb64
at java.lang.Object.wait(Native Method)

• waiting on java.lang.Object@1a6fb64
  at java.lang.Object.wait(Unknown Source)
  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@27b0a3
at java.lang.Object.wait(Native Method)

• waiting on java.lang.ref.ReferenceQueue$Lock@27b0a3
  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 kt$1.run(SourceFile:66)

"Snooper Timer" Id=10 TIMED_WAITING on java.util.TaskQueue@116ddfb
at java.lang.Object.wait(Native Method)

• waiting on java.util.TaskQueue@116ddfb
  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@451e1d
at java.lang.Object.wait(Native Method)

• waiting on java.lang.ref.ReferenceQueue$Lock@451e1d
  at java.lang.ref.ReferenceQueue.remove(Unknown Source)
  at java.lang.ref.ReferenceQueue.remove(Unknown Source)
  at java.lang.ref.Finalizer$FinalizerThread.run(Unknown Source)

"Reference Handler" Id=2 WAITING on java.lang.ref.Reference$Lock@1cb4ea
at java.lang.Object.wait(Native Method)

• waiting on java.lang.ref.Reference$Lock@1cb4ea
  at java.lang.Object.wait(Unknown Source)
  at java.lang.ref.Reference$ReferenceHandler.run(Unknown Source)

Stacktrace:
at ku.run(SourceFile:59)
at java.lang.Thread.run(Unknown Source)

– System Details –
Details:
Minecraft Version: 15w33c
Operating System: Windows 8.1 (x86) version 6.3
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 870055048 bytes (829 MB) / 1037959168 bytes (989 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 2 total; -Xms1G -Xmx1G
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Profiler Position: N/A (disabled)
Player Count: 3 / 5; [ll['WildCat_02'/395, l='world', x=984,86, y=70,02, z=1296,01], ll['HumidCross6834'/84270, l='world', x=24,27, y=63,00, z=4,66], ll['CabinetSeeker42'/94128, l='world', x=-294,14, y=65,79, z=638,65]]
Is Modded: Unknown (can't tell)
Type: Dedicated Server (map_server.txt)