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https://issues.apache.org/jira/browse/MAPREDUCE-2530?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13038789#comment-13038789
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Thomas Graves commented on MAPREDUCE-2530:
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Yes, I marked it as duplicate, but that apparently doesn't close it. Please go
ahead and close.
> TaskTracker jetty stuck in a tight loop
> ----------------------------------------
>
> Key: MAPREDUCE-2530
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2530
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: tasktracker
> Affects Versions: 0.20.204.0
> Reporter: Thomas Graves
> Assignee: Thomas Graves
>
> We are seeing some TaskTracker jetty servers stuck in a tight loop. This
> appears to be related to Jetty bug 937
> (http://jira.codehaus.org/browse/JETTY-937).
> stack trace for this thread 15993(0x3e79) showing a loop in jetty.
> "21006965@qtp-11400638-0 - Acceptor0 [email protected]:50060"
> prio=10 tid=0x08e6d400 nid=0x3e79
> runnable [0xaddfb000]
> java.lang.Thread.State: RUNNABLE
> at java.lang.Throwable.fillInStackTrace(Native Method)
> - locked <0xdf2708e8> (a java.io.IOException)
> at java.lang.Throwable.<init>(Throwable.java:196)
> at java.lang.Exception.<init>(Exception.java:41)
> at java.io.IOException.<init>(IOException.java:41)
> at sun.nio.ch.EPollArrayWrapper.epollWait(Native Method)
> at sun.nio.ch.EPollArrayWrapper.poll(EPollArrayWrapper.java:210)
> at sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:65)
> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:69)
> - locked <0xb6524f58> (a sun.nio.ch.Util$1)
> - locked <0xb6524f68> (a java.util.Collections$UnmodifiableSet)
> - locked <0xb6400930> (a sun.nio.ch.EPollSelectorImpl)
> at sun.nio.ch.SelectorImpl.selectNow(SelectorImpl.java:88)
> at
> org.mortbay.io.nio.SelectorManager$SelectSet.doSelect(SelectorManager.java:652)
> at
> org.mortbay.io.nio.SelectorManager.doSelect(SelectorManager.java:192)
> at
> org.mortbay.jetty.nio.SelectChannelConnector.accept(SelectChannelConnector.java:124)
> at
> org.mortbay.jetty.AbstractConnector$Acceptor.run(AbstractConnector.java:708)
> at
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
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