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Posted to issues@impala.apache.org by "Michael Ho (JIRA)" <ji...@apache.org> on 2019/06/07 01:38:00 UTC

[jira] [Created] (IMPALA-8634) Catalog client should be resilient to temporary Catalog outage

Michael Ho created IMPALA-8634:
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             Summary: Catalog client should be resilient to temporary Catalog outage
                 Key: IMPALA-8634
                 URL: https://issues.apache.org/jira/browse/IMPALA-8634
             Project: IMPALA
          Issue Type: Improvement
          Components: Catalog
    Affects Versions: Impala 3.2.0
            Reporter: Michael Ho


Currently, when the catalog server is down, catalog clients will fail all RPCs sent to it. In essence, DDL queries will fail and the Impala service becomes a lot less functional. Catalog clients should consider retrying failed RPCs with some exponential backoff in between while catalog server is being restarted after crashing. We probably need to add [a test |https://github.com/apache/impala/blob/master/tests/custom_cluster/test_restart_services.py] to exercise the paths of catalog restart to verify coordinators are resilient to it.

cc'ing [~stakiar], [~joemcdonnell], [~twm378]



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