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Posted to yarn-dev@hadoop.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2015/02/25 16:45:04 UTC

[jira] [Created] (YARN-3260) NPE if AM attempts to register before RM processes launch event

Jason Lowe created YARN-3260:
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             Summary: NPE if AM attempts to register before RM processes launch event
                 Key: YARN-3260
                 URL: https://issues.apache.org/jira/browse/YARN-3260
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
    Affects Versions: 2.6.0
            Reporter: Jason Lowe


The RM on one of our clusters was running behind on processing AsyncDispatcher events, and this caused AMs to fail to register due to an NPE.  The AM was launched and attempting to register before the RMAppAttemptImpl had processed the LAUNCHED event, and the client to AM token had not been generated yet.  The NPE occurred because the ApplicationMasterService tried to encode the missing token.



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