[jira] [Created] (IMPALA-12146) Memory reserved doesn't get updated if an executor backend gets abnormally terminated

["Abhishek Rawat (Jira)" <ji...@apache.org>]

Abhishek Rawat created IMPALA-12146:
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             Summary: Memory reserved doesn't get updated if an executor backend gets abnormally terminated
                 Key: IMPALA-12146
                 URL: https://issues.apache.org/jira/browse/IMPALA-12146
             Project: IMPALA
          Issue Type: Bug
            Reporter: Abhishek Rawat


If an executor backend is abnormally terminated its memory reserved accounting doesn't get updated and as a result the admission controller gets an incorrect view of the reserved memory for that particular backend. The side effect is that even if the abnormally terminated executor is restarted and added to the cluster, its reserved memory is still incorrectly set to the value before termination.

Repro:
 * Execute a long running query
 * Kill one of the Impalads which is an executor only backend while the query is running.
 * Restart the executor backend which was abnormally terminated above
 * On the web ui go to the /backends page and the 'Memory Reserved' for the executor backend would be non zero
 * Even if the session is closed the 'Memory Reserved' for the executor backend remains non zero.



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