[jira] [Created] (TEZ-2261) Should add diagnostics in DAGAppMaster when recovery error happens

["Jeff Zhang (JIRA)" <ji...@apache.org>]

Jeff Zhang created TEZ-2261:
-------------------------------

             Summary: Should add diagnostics in DAGAppMaster when recovery error happens
                 Key: TEZ-2261
                 URL: https://issues.apache.org/jira/browse/TEZ-2261
             Project: Apache Tez
          Issue Type: Bug
            Reporter: Jeff Zhang


Should add diagnostics in DAGAppMaster when recovery error happens, otherwise AM is shutdown and the next dag submission will just throw SessionNotRunningException which would confuse users.

{code}
        if (this.historyEventHandler.hasRecoveryFailed()) {
          LOG.warn("Recovery had a fatal error, shutting down session after" +
              " DAG completion");
          sessionStopped.set(true);
        }
{code}



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