Playing vanilla Minecraft with the normal server for 1.8.6, loading new chunks (I think?) crashes the game. A player goes a bit away from the previously loaded area, and the server stops responding and crashes.

---- Minecraft Crash Report ----
// You're mean.

Time: 1/23/16 11:55 PM
Description: Watching Server

java.lang.Error
at nq.c(SourceFile:63)
at nq.b(SourceFile:58)
at ld.a(SourceFile:51)
at adm.a(SourceFile:269)
at adm.a(SourceFile:220)
at adm.e(SourceFile:213)
at adm.b(SourceFile:604)
at adm.a(SourceFile:2083)
at adm.c(SourceFile:2106)
at adm.x(SourceFile:2053)
at amy.e(SourceFile:1161)
at amy.n(SourceFile:1094)
at amy.b(SourceFile:916)
at le.h(SourceFile:332)
at le.c(SourceFile:202)
at net.minecraft.server.MinecraftServer.B(SourceFile:599)
at ko.B(SourceFile:299)
at net.minecraft.server.MinecraftServer.A(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 nq.c(SourceFile:63)
at nq.b(SourceFile:58)
at ld.a(SourceFile:51)
at adm.a(SourceFile:269)
at adm.a(SourceFile:220)
at adm.e(SourceFile:213)
at adm.b(SourceFile:604)
at adm.a(SourceFile:2083)
at adm.c(SourceFile:2106)
at adm.x(SourceFile:2053)
at amy.e(SourceFile:1161)
at amy.n(SourceFile:1094)
at amy.b(SourceFile:916)
at le.h(SourceFile:332)
at le.c(SourceFile:202)
at net.minecraft.server.MinecraftServer.B(SourceFile:599)
at ko.B(SourceFile:299)
at net.minecraft.server.MinecraftServer.A(SourceFile:535)

– Thread Dump –
Details:
Threads: "Netty Epoll Server IO #2" Id=27 RUNNABLE
at io.netty.channel.epoll.Native.epollWait(Native Method)
at io.netty.channel.epoll.EpollEventLoop.epollWait(EpollEventLoop.java:194)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:219)
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
at java.lang.Thread.run(Thread.java:745)

"File IO Thread" Id=34 TIMED_WAITING
at java.lang.Thread.sleep(Native Method)
at auc.c(SourceFile:51)
at auc.run(SourceFile:30)
at java.lang.Thread.run(Thread.java:745)

"Netty Epoll Server IO #1" Id=26 RUNNABLE
at io.netty.channel.epoll.Native.epollWait(Native Method)
at io.netty.channel.epoll.EpollEventLoop.epollWait(EpollEventLoop.java:194)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:219)
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
at java.lang.Thread.run(Thread.java:745)

"Server Watchdog" Id=30 RUNNABLE
at sun.management.ThreadImpl.dumpThreads0(Native Method)
at sun.management.ThreadImpl.dumpAllThreads(ThreadImpl.java:446)
at kp.run(SourceFile:43)
at java.lang.Thread.run(Thread.java:745)

"Netty Epoll Server IO #0" Id=25 RUNNABLE (in native)
at io.netty.channel.epoll.Native.epollWait(Native Method)
at io.netty.channel.epoll.EpollEventLoop.epollWait(EpollEventLoop.java:194)
at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:219)
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
at java.lang.Thread.run(Thread.java:745)

"Server console handler" Id=22 RUNNABLE (in native)
at java.io.FileInputStream.readBytes(Native Method)
at java.io.FileInputStream.read(FileInputStream.java:255)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:284)
at java.io.BufferedInputStream.read(BufferedInputStream.java:345)

• locked java.io.BufferedInputStream@58ff623f
  at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284)
  at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326)
  at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
• locked java.io.InputStreamReader@56388750
  at java.io.InputStreamReader.read(InputStreamReader.java:184)
  ...

"DestroyJavaVM" Id=21 RUNNABLE

"Server thread" Id=19 RUNNABLE
at nq.c(SourceFile:63)
at nq.b(SourceFile:58)
at ld.a(SourceFile:51)
at adm.a(SourceFile:269)
at adm.a(SourceFile:220)
at adm.e(SourceFile:213)
at adm.b(SourceFile:604)
at adm.a(SourceFile:2083)
...

"TimerQueue" Id=18 TIMED_WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@17058d6b
at sun.misc.Unsafe.park(Native Method)

• waiting on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@17058d6b
  at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
  at java.util.concurrent.DelayQueue.take(DelayQueue.java:223)
  at javax.swing.TimerQueue.run(TimerQueue.java:171)
  at java.lang.Thread.run(Thread.java:745)

Number of locked synchronizers = 1

• java.util.concurrent.locks.ReentrantLock$NonfairSync@5207094f

"Thread-3" Id=17 WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@34c8fb2e
at sun.misc.Unsafe.park(Native Method)

• waiting on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@34c8fb2e
  at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
  at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
  at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
  at com.mojang.util.QueueLogAppender.getNextLogEvent(QueueLogAppender.java:77)
  at kr$4.run(SourceFile:114)
  at java.lang.Thread.run(Thread.java:745)

"AWT-EventQueue-0" Id=15 RUNNABLE
at java.lang.System.identityHashCode(Native Method)
at sun.awt.SunHints$Value.hashCode(SunHints.java:163)
at java.awt.font.FontRenderContext.hashCode(FontRenderContext.java:353)
at sun.font.FontDesignMetrics$MetricsKey.init(FontDesignMetrics.java:217)
at sun.font.FontDesignMetrics.getMetrics(FontDesignMetrics.java:286)

• locked java.lang.Class@2658f8e0
  at sun.swing.SwingUtilities2.getFontMetrics(SwingUtilities2.java:1113)
  at javax.swing.JComponent.getFontMetrics(JComponent.java:1626)
  at sun.swing.SwingUtilities2.getFontMetrics(SwingUtilities2.java:372)
  ...

"AWT-Shutdown" Id=16 WAITING on java.lang.Object@4c7fd015
at java.lang.Object.wait(Native Method)

• waiting on java.lang.Object@4c7fd015
  at java.lang.Object.wait(Object.java:502)
  at sun.awt.AWTAutoShutdown.run(AWTAutoShutdown.java:295)
  at java.lang.Thread.run(Thread.java:745)

"AWT-XAWT" Id=14 RUNNABLE (in native)
at sun.awt.X11.XToolkit.waitForEvents(Native Method)
at sun.awt.X11.XToolkit.run(XToolkit.java:568)
at sun.awt.X11.XToolkit.run(XToolkit.java:532)
at java.lang.Thread.run(Thread.java:745)

"Java2D Disposer" Id=12 WAITING on java.lang.ref.ReferenceQueue$Lock@772a7224
at java.lang.Object.wait(Native Method)

• waiting on java.lang.ref.ReferenceQueue$Lock@772a7224
  at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
  at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
  at sun.java2d.Disposer.run(Disposer.java:148)
  at java.lang.Thread.run(Thread.java:745)

"Server Infinisleeper" Id=11 TIMED_WAITING
at java.lang.Thread.sleep(Native Method)
at ko$1.run(SourceFile:65)

"Snooper Timer" Id=10 TIMED_WAITING on java.util.TaskQueue@448f664
at java.lang.Object.wait(Native Method)

• waiting on java.util.TaskQueue@448f664
  at java.util.TimerThread.mainLoop(Timer.java:552)
  at java.util.TimerThread.run(Timer.java:505)

"Signal Dispatcher" Id=4 RUNNABLE

"Finalizer" Id=3 WAITING on java.lang.ref.ReferenceQueue$Lock@65b681f5
at java.lang.Object.wait(Native Method)

• waiting on java.lang.ref.ReferenceQueue$Lock@65b681f5
  at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
  at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164)
  at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)

"Reference Handler" Id=2 WAITING on java.lang.ref.Reference$Lock@577b1a2e
at java.lang.Object.wait(Native Method)

• waiting on java.lang.ref.Reference$Lock@577b1a2e
  at java.lang.Object.wait(Object.java:502)
  at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:157)

Stacktrace:
at kp.run(SourceFile:59)
at java.lang.Thread.run(Thread.java:745)

– System Details –
Details:
Minecraft Version: 1.8.9
Operating System: Linux (amd64) version 4.2.0-16-generic
Java Version: 1.8.0_66, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 390347600 bytes (372 MB) / 594018304 bytes (566 MB) up to 921174016 bytes (878 MB)
JVM Flags: 0 total;
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Profiler Position: N/A (disabled)
Player Count: 2 / 20; [lf['sorariku124'/164, l='world', x=378.13, y=72.00, z=-19.44], lf['xXDJ_ShadowXx'/199, l='world', x=-260.24, y=69.00, z=295.82]]
Is Modded: Unknown (can't tell)
Type: Dedicated Server (map_server.txt)