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https://issues.apache.org/jira/browse/MAPREDUCE-2529?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13039909#comment-13039909
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Thomas Graves commented on MAPREDUCE-2529:
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I'm proposing to add a new metric to the shuffle output metrics and increment
it when it sees a configurable regex in the IOexception in the
MapOutputServlet. This metric can then be viewed by external systems or
potentially the health_check script (HADOOP-7144 should make that easier).
Making it configurable will make it more useful in the future in case we see
other Jetty/JVM exceptions/issues that need to be worked around.
> Recognize Jetty bug 1342 and handle it
> --------------------------------------
>
> Key: MAPREDUCE-2529
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-2529
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: tasktracker
> Affects Versions: 0.20.204.0, 0.23.0
> Reporter: Thomas Graves
> Assignee: Thomas Graves
>
> We are seeing many instances of the Jetty-1342
> (http://jira.codehaus.org/browse/JETTY-1342). The bug doesn't cause Jetty to
> stop responding altogether, some fetches go through but a lot of them throw
> exceptions and eventually fail. The only way we have found to get the TT out
> of this state is to restart the TT. This jira is to catch this particular
> exception (or perhaps a configurable regex) and handle it in an automated way
> to either blacklist or shutdown the TT after seeing it a configurable number
> of them.
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