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Posted to dev@hive.apache.org by "Yu-Wen Lai (Jira)" <ji...@apache.org> on 2022/07/21 17:43:00 UTC

[jira] [Created] (HIVE-26419) Use a different pool for DataNucleus' secondary connection factory

Yu-Wen Lai created HIVE-26419:
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             Summary: Use a different pool for DataNucleus' secondary connection factory
                 Key: HIVE-26419
                 URL: https://issues.apache.org/jira/browse/HIVE-26419
             Project: Hive
          Issue Type: Bug
          Components: Standalone Metastore
            Reporter: Yu-Wen Lai
            Assignee: Yu-Wen Lai


Quote from DataNucleus documentation:
{quote}The secondary connection factory is used for schema generation, and for value generation operations (unless specified to use primary).
{quote}
We should not use same connection pool for DataNucleus' primary and secondary connection factory. An awful situation is that each thread holds one connection and request for another connection for value generation, but no connection is available in the pool. It will keep retrying and fail at the end.



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