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Posted to issues@impala.apache.org by "Lars Volker (JIRA)" <ji...@apache.org> on 2017/11/16 00:03:00 UTC

[jira] [Created] (IMPALA-6194) Make fragment instances cancellable

Lars Volker created IMPALA-6194:
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             Summary: Make fragment instances cancellable
                 Key: IMPALA-6194
                 URL: https://issues.apache.org/jira/browse/IMPALA-6194
             Project: IMPALA
          Issue Type: Improvement
          Components: Backend
            Reporter: Lars Volker


Currently queries can get stuck in an uncancellable state, e.g. when blocking on function calls or condition variables without periodically checking for cancellation. We should eliminate all those calls and make sure we don't re-introduce such issues. One option would be a watchdog to check that each fragment instance regularly calls RETURN_IF_CANCEL.



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