[jira] [Created] (TEZ-2988) DAGAppMaster::shutdownTezAM should return with a no-op if it has been invoked earlier

[Hitesh Shah (JIRA)]

Hitesh Shah created TEZ-2988:
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             Summary: DAGAppMaster::shutdownTezAM should return with a no-op if 
it has been invoked earlier
                 Key: TEZ-2988
                 URL: https://issues.apache.org/jira/browse/TEZ-2988
             Project: Apache Tez
          Issue Type: Bug
            Reporter: Hitesh Shah


If the session is already shutting down, DAGAppMaster::shutdownTezAM() should 
not block. 



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