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

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

     [ https://issues.apache.org/jira/browse/IMPALA-12146?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Abhishek Rawat reassigned IMPALA-12146:
---------------------------------------

    Assignee: Abhishek Rawat

> 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
>            Assignee: Abhishek Rawat
>            Priority: Critical
>
> 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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