[MAPREDUCE-2530] TaskTracker jetty stuck in a tight loop

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 0.20.204.0
• Component/s: tasktracker
• Assignee: Thomas Graves
• Reporter: Thomas Graves
• Created: 24/May/11 15:21
• Updated: 03/Jun/11 16:35
• Resolved: 03/Jun/11 16:35

Description

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 SelectChannelConnector@0.0.0.0:50060" 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)

Issue Links

• duplicates: MAPREDUCE-2386 TT jetty server stuck in tight loop around epoll_wait
• relates to: MAPREDUCE-2386 TT jetty server stuck in tight loop around epoll_wait