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Why Does My Minecraft Crash Every Time I Join?

David Miller • • 7 min read
Why Does My Minecraft Crash Every Time I Join?

I'm running a minecraft server for 3 friends. It has been working fine for a week, but now crashed almost instantly when I join. Below is the low, but I dont really know what Im looking for or how to fix it. I have no mods installed.

---- Minecraft Crash Report ----
// Daisy, daisy...

Time: 1/12/16 10:22 PM
Description: Watching Server

java.lang.Error
    at adm.a(SourceFile:204)
    at adm.a(SourceFile:217)
    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(Unknown Source)


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

-- Head --
Stacktrace:
    at adm.a(SourceFile:204)
    at adm.a(SourceFile:217)
    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 Server IO #2" Id=33 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$400(Unknown Source)
    at sun.nio.ch.WindowsSelectorImpl.doSelect(Unknown Source)
    at sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)
    -  locked io.netty.channel.nio.SelectedSelectionKeySet@7ecb2fee
    -  locked java.util.Collections$UnmodifiableSet@700cce47
    -  locked sun.nio.ch.WindowsSelectorImpl@7433449e
    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)
    ...


"File IO Thread" Id=50 TIMED_WAITING
    at java.lang.Thread.sleep(Native Method)
    at auc.c(SourceFile:51)
    at auc.run(SourceFile:30)
    at java.lang.Thread.run(Unknown Source)


"Netty Server IO #1" Id=32 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$400(Unknown Source)
    at sun.nio.ch.WindowsSelectorImpl.doSelect(Unknown Source)
    at sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)
    -  locked io.netty.channel.nio.SelectedSelectionKeySet@3131c47c
    -  locked java.util.Collections$UnmodifiableSet@162229eb
    -  locked sun.nio.ch.WindowsSelectorImpl@4ab39e
    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)
    ...


"Server Watchdog" Id=48 RUNNABLE
    at sun.management.ThreadImpl.dumpThreads0(Native Method)
    at sun.management.ThreadImpl.dumpAllThreads(Unknown Source)
    at kp.run(SourceFile:43)
    at java.lang.Thread.run(Unknown Source)


"Netty Server IO #0" 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$400(Unknown Source)
    at sun.nio.ch.WindowsSelectorImpl.doSelect(Unknown Source)
    at sun.nio.ch.SelectorImpl.lockAndDoSelect(Unknown Source)
    -  locked io.netty.channel.nio.SelectedSelectionKeySet@6eb300bd
    -  locked java.util.Collections$UnmodifiableSet@511e3b33
    -  locked sun.nio.ch.WindowsSelectorImpl@56f43d8a
    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)
    ...


"DestroyJavaVM" Id=29 RUNNABLE


"Server console handler" Id=28 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@3f7a289
    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@75b7eca2
    at java.io.InputStreamReader.read(Unknown Source)
    ...


"Server thread" Id=26 RUNNABLE
    at adm.a(SourceFile:204)
    at adm.a(SourceFile:217)
    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)
    ...


"AWT-EventQueue-0" Id=23 RUNNABLE
    at sun.font.T2KFontScaler.getGlyphMetricsNative(Native Method)
    at sun.font.T2KFontScaler.getGlyphMetrics(Unknown Source)
    -  locked sun.font.T2KFontScaler@55508684
    at sun.font.FileFont.getGlyphMetrics(Unknown Source)
    at sun.font.FileFontStrike.getGlyphMetrics(Unknown Source)
    at sun.font.FileFontStrike.getGlyphAdvance(Unknown Source)
    at sun.font.FileFontStrike.getGlyphImageFromWindows(Unknown Source)
    at sun.font.FileFontStrike.getGlyphImageFromNative(Unknown Source)
    at sun.font.FileFontStrike.getGlyphImagePtr(Unknown Source)
    ...


"AWT-Shutdown" Id=24 WAITING on java.lang.Object@22bff9c9
    at java.lang.Object.wait(Native Method)
    -  waiting on java.lang.Object@22bff9c9
    at java.lang.Object.wait(Unknown Source)
    at sun.awt.AWTAutoShutdown.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)


"TimerQueue" Id=22 TIMED_WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@567ad92f
    at sun.misc.Unsafe.park(Native Method)
    -  waiting on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@567ad92f
    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@1c62e4fd


"Thread-4" Id=21 WAITING on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@7cf11c2
    at sun.misc.Unsafe.park(Native Method)
    -  waiting on java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject@7cf11c2
    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 kr$4.run(SourceFile:114)
    at java.lang.Thread.run(Unknown Source)


"AWT-Windows" Id=17 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)


"Java2D Disposer" Id=15 WAITING on java.lang.ref.ReferenceQueue$Lock@5ae3c143
    at java.lang.Object.wait(Native Method)
    -  waiting on java.lang.ref.ReferenceQueue$Lock@5ae3c143
    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=14 TIMED_WAITING
    at java.lang.Thread.sleep(Native Method)
    at ko$1.run(SourceFile:65)


"Snooper Timer" Id=13 TIMED_WAITING on java.util.TaskQueue@512d93ee
    at java.lang.Object.wait(Native Method)
    -  waiting on java.util.TaskQueue@512d93ee
    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$Lock@511e8b45
    at java.lang.Object.wait(Native Method)
    -  waiting on java.lang.ref.ReferenceQueue$Lock@511e8b45
    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$Lock@2ea0d1a5
    at java.lang.Object.wait(Native Method)
    -  waiting on java.lang.ref.Reference$Lock@2ea0d1a5
    at java.lang.Object.wait(Unknown Source)
    at java.lang.ref.Reference$ReferenceHandler.run(Unknown Source)



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

-- System Details --
Details:
    Minecraft Version: 1.8.9
    Operating System: Windows Server 2012 R2 (amd64) version 6.3
    Java Version: 1.8.0_65, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 1214620224 bytes (1158 MB) / 1401946112 bytes (1337 MB) up to 1908932608 bytes (1820 MB)
    JVM Flags: 2 total; -Xms1024M -Xmx2048M
    IntCache: cache: 1, tcache: 1, allocated: 12, tallocated: 94
    Profiler Position: N/A (disabled)
    Player Count: 1 / 20; [lf['negativesixtysix'/282, l='world', x=-61.52, y=81.00, z=-877.51]]
    Is Modded: Unknown (can't tell)
    Type: Dedicated Server (map_server.txt)
7

1 Answer

This crash was caused by a feature called the server watchdog, which was added in 1.8. Its job is to shut the server down if a single server tick takes more than a configurable number of milliseconds (by default 60000, or 60 seconds).

You can work around this by setting max-tick-time in server.properties to a higher number, or to -1, to disable it entirely. See MC-63590 for more details.

2
David Miller
Author

David Miller

David Miller brings 15 years of experience in global economics, personal finance strategy, and market dynamics. He specializes in turning complex economic trends into actionable insights for everyday readers.