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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-4817) Hardcoded task ping timeout kills tasks localizing large amounts of data
Date Thu, 22 Nov 2012 01:56:58 GMT
Jason Lowe created MAPREDUCE-4817:
-------------------------------------

             Summary: Hardcoded task ping timeout kills tasks localizing large amounts of
data
                 Key: MAPREDUCE-4817
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4817
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: applicationmaster, mr-am
    Affects Versions: 0.23.3, 2.0.3-alpha
            Reporter: Jason Lowe


When a task is launched and spends more than 5 minutes localizing files, the AM will kill
the task due to ping timeout.  The AM's TaskHeartbeatHandler currently tracks tasks via a
progress timeout and a ping timeout.  The progress timeout can be controlled via mapreduce.task.timeout
and even disabled by setting the property to 0.  The ping timeout, however, is hardcoded to
5 minutes and cannot be configured.  Therefore if the task takes too long localizing, it never
gets running in order to ping back to the AM and the AM kills it due to ping timeout.

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