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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-4797) LocalContainerAllocator can loop forever trying to contact the RM
Date Wed, 14 Nov 2012 02:16:12 GMT
Jason Lowe created MAPREDUCE-4797:
-------------------------------------

             Summary: LocalContainerAllocator can loop forever trying to contact the RM
                 Key: MAPREDUCE-4797
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4797
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: applicationmaster
    Affects Versions: 2.0.1-alpha, 0.23.3
            Reporter: Jason Lowe


If LocalContainerAllocator has trouble communicating with the RM it can end up retrying forever
if the nature of the error is not a YarnException.

This can be particulary bad if the connection went down because the cluster was reset such
that the RM and NM have lost track of the process and therefore nothing else will eventually
kill the process.  In this scenario, the looping AM continues to pelt the RM with connection
requests every second using a stale token, and the RM logs the SASL exceptions over and over.

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