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From "Todd Lipcon (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4121) dump the threads stack trace to stdout before killing a Task in timeout
Date Mon, 09 Apr 2012 05:33:38 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4121?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13249681#comment-13249681

Todd Lipcon commented on MAPREDUCE-4121:

I don't think anyone is working on it. If you want to provide a backport patch for branch-1
I can take a look -- but I imagine it will be a substantial amount of work -- the code changed
a lot since then.
> dump the threads stack trace to stdout before killing a Task in timeout
> -----------------------------------------------------------------------
>                 Key: MAPREDUCE-4121
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4121
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>            Reporter: Julien Le Dem
> Typically when a job fails because of tasks timing out we investigate the issue by running
the job again and triggering a dump of the thread stack traces of one of the tasks with jstack/"kill
-3" before it times out.
> It would be convenient if the Task tracker could do the same right before killing tasks
in time out. This usually points at the offending code.

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