Abhishek Rawat created IMPALA-14475:
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Summary: Clean up queued queries from admission_state_map
submitted by unregistered coordinators
Key: IMPALA-14475
URL: https://issues.apache.org/jira/browse/IMPALA-14475
Project: IMPALA
Issue Type: Improvement
Reporter: Abhishek Rawat
When coordinator restarts, admission controller gets cluster membership updates
and it cleans up resources for running queries, including removing them from
admission_state_map.
AdmissionControlService::CancelQueriesOnFailedCoordinators takes care of
cleaning up resources related to running queries. However, it doesn't clean up
resources for queued queries.
IMPALA-12057 added support for rejecting queued queries from admission queue if
they were submitted by coordinators which are no longer part of the cluster.
This however still doesn't clean up the admission state for such queries from
admission_state_map.
Repro:
# Run standalone admissiond
# Submit queries such that some are queued
# Kill/restart coordinators such that there were queued queries
# check admission_state_map's size and it will be non zero indicating orphan
(queued) queries still in the admission_state_map
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