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Posted to dev@hive.apache.org by "Wechar (Jira)" <ji...@apache.org> on 2023/02/21 17:10:00 UTC

[jira] [Created] (HIVE-27097) Improve the retry strategy for Metastore client and server

Wechar created HIVE-27097:
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             Summary: Improve the retry strategy for Metastore client and server
                 Key: HIVE-27097
                 URL: https://issues.apache.org/jira/browse/HIVE-27097
             Project: Hive
          Issue Type: Improvement
          Components: Hive
    Affects Versions: 4.0.0-alpha-2
            Reporter: Wechar
            Assignee: Wechar


*Background*
Hive provides *{{RetryingMetaStoreClient}}* and *{{RetryingHMSHandler}}* to do retry when thrift request failed:
* RetryingMetaStoreClient will retry for *thrift related exception* and some *MetaException*
* RetryingHMSHandler will retry for all *JDOException*.

*Motivation*
Current retry mechanism will lead to many unnecessary retries in both client and server. To simplify the process, we introduce following retry mechanism:
* Client side only concerns the error of communication, i.e., *TTransportException*.
* Server side can skip some exceptions which always turn to fail even with retry, like *SQLIntegrityConstraintViolationException*.




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