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From "Mala Chikka Kempanna (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IMPALA-5712) Provide option to cancel queries when in CREATED state
Date Mon, 24 Jul 2017 23:00:00 GMT
Mala Chikka Kempanna created IMPALA-5712:
--------------------------------------------

             Summary: Provide option to cancel queries when in CREATED state 
                 Key: IMPALA-5712
                 URL: https://issues.apache.org/jira/browse/IMPALA-5712
             Project: IMPALA
          Issue Type: Improvement
          Components: Frontend
    Affects Versions: Impala 2.7.0
            Reporter: Mala Chikka Kempanna


At present, there is no-way to cancel queries in CREATED state.

For various reasons, because of connectivity issues with HMS or catalog, queries may sometimes
stay in CREATED state longer . And if admission control is implemented, these queries end
up occupying admission control queue. (These queries cannot recover from whatever issue they
had connecting to HMS even after service becomes normal and stay stuck in CREATED state).
And only way to cleanup these queries is the restart the co-ordinator.

But these queries in created state are non-cancellable right now.
They should be available for cancel and be released from Admission control queue.

OR

The queries in CREATED state should not occupy admission control queue.




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