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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