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Posted to issues-all@impala.apache.org by "Thomas Tauber-Marshall (Jira)" <ji...@apache.org> on 2021/03/17 22:40:00 UTC

[jira] [Created] (IMPALA-10591) Fix issues with failed ReleaseQueryBackends rpc

Thomas Tauber-Marshall created IMPALA-10591:
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             Summary: Fix issues with failed ReleaseQueryBackends rpc
                 Key: IMPALA-10591
                 URL: https://issues.apache.org/jira/browse/IMPALA-10591
             Project: IMPALA
          Issue Type: Sub-task
          Components: Backend
    Affects Versions: Impala 4.0
            Reporter: Thomas Tauber-Marshall


Currently, if the admission control service is being used, the coordinator will attempt the ReleaseQueryBackends rpc up to 3 times before giving up. If a ReleaseQueryBackends rpc fails it can lead to resources not being released properly. If a subsequent ReleaseQuery rpc succeeds, we'll hit a DCHECK as AdmissionController::ReleaseQuery() assumes that all backends have already been released.

We should clean this up and ensure that resources are always released properly.



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