Michael Smith created IMPALA-14339:
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             Summary: Cancel catalogd requests when query is cancelled
                 Key: IMPALA-14339
                 URL: https://issues.apache.org/jira/browse/IMPALA-14339
             Project: IMPALA
          Issue Type: Improvement
          Components: Frontend
    Affects Versions: Impala 5.0.0
            Reporter: Michael Smith


After IMPALA-915, queries can be cancelled during planning. When that happens, 
any catalog operations started will continue to completion.

Those catalog operations can use significant resources; if the query was 
cancelled because there's a problem in catalogd, leaving the operation running 
may lead to an outage in catalogd.

On the other hand, sometimes the operation was doing useful work that will 
benefit a later query, and we want to leave it running.

It would probably be useful to have a way to cancel catalog operations related 
to a query or table, but not necessarily do that immediately when the query is 
cancelled.



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