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https://issues.apache.org/jira/browse/MAPREDUCE-1950?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Scott Chen reassigned MAPREDUCE-1950:
-------------------------------------
Assignee: Scott Chen
> Jetty Acceptor can stuck TaskTracker forever
> --------------------------------------------
>
> Key: MAPREDUCE-1950
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1950
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: tasktracker
> Affects Versions: 0.20.1
> Reporter: Scott Chen
> Assignee: Scott Chen
>
> We have observed some TaskTrackers keep getting blacklisted because of "Too
> many fetch-failure" and the logs are full of the following exception.
> There can be lots of these exceptions in one millisecond.
> {code}
> 2010-07-19 15:00:00,146 ERROR org.mortbay.log: EXCEPTION
> java.nio.channels.ClosedSelectorException
> at sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:66)
> at sun.nio.ch.SelectorImpl.selectNow(SelectorImpl.java:88)
> at
> org.mortbay.io.nio.SelectorManager$SelectSet.doSelect(SelectorManager.java:630)
> at
> org.mortbay.io.nio.SelectorManager.doSelect(SelectorManager.java:191)
> at
> org.mortbay.jetty.nio.SelectChannelConnector.accept(SelectChannelConnector.java:124)
> at
> org.mortbay.jetty.AbstractConnector$Acceptor.run(AbstractConnector.java:708)
> at
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
> {code}
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