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From "Rohith (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MAPREDUCE-5910) MRAppMaster should handle Resync from RM instead of shutting down.
Date Fri, 30 May 2014 12:44:01 GMT
Rohith created MAPREDUCE-5910:
---------------------------------

             Summary: MRAppMaster should handle Resync from RM instead of shutting down.
                 Key: MAPREDUCE-5910
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5910
             Project: Hadoop Map/Reduce
          Issue Type: Task
          Components: applicationmaster
            Reporter: Rohith
            Assignee: Rohith
             Fix For: 2.5.0


The ApplicationMasterService currently sends a resync response to which the AM responds by
shutting down. The MRAppMaster behavior is expected to change to calling resyncing with the
RM. Resync means resetting the allocate RPC sequence number to 0 and the AM should send its
entire outstanding request to the RM. Note that if the AM is making its first allocate call
to the RM then things should proceed like normal without needing a resync. The RM will return
all containers that have completed since the RM last synced with the AM. Some container completions
may be reported more than once.



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