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Posted to dev@hive.apache.org by "Vihang Karajgaonkar (JIRA)" <ji...@apache.org> on 2018/06/05 20:43:00 UTC

[jira] [Created] (HIVE-19804) msck repair should hold locks

Vihang Karajgaonkar created HIVE-19804:
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             Summary: msck repair should hold locks
                 Key: HIVE-19804
                 URL: https://issues.apache.org/jira/browse/HIVE-19804
             Project: Hive
          Issue Type: Improvement
            Reporter: Vihang Karajgaonkar


{msck repair table <tablename>}} does not hold locks. This can lead to weird race conditions when concurrent sessions are running on the same table.  For example if two sessions run msck on the same table at the same time, they both try to add partitions and they might both end up with failures due to AlreadyExistsException. Another example would be if a query is running on a partitioned table while some other session issues msck repair which add/drops the partitions, it could trigger errors during query execution.



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