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https://issues.apache.org/jira/browse/MAPREDUCE-4121?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julien Le Dem resolved MAPREDUCE-4121.
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Resolution: Duplicate
> 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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