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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-5044) Have AM trigger jstack on task attempts that timeout before killing them
Date Sat, 02 Mar 2013 18:09:13 GMT
Jason Lowe created MAPREDUCE-5044:
-------------------------------------

             Summary: Have AM trigger jstack on task attempts that timeout before killing
them
                 Key: MAPREDUCE-5044
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5044
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
          Components: mr-am
    Affects Versions: 2.0.4-beta
            Reporter: Jason Lowe


When an AM expires a task attempt it would be nice if it triggered a jstack output via SIGQUIT
before killing the task attempt.  This would be invaluable for helping users debug their hung
tasks, especially if they do not have shell access to the nodes.

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