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https://issues.apache.org/jira/browse/HIVE-11585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14700267#comment-14700267
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Sergey Shelukhin commented on HIVE-11585:
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There may be implications of that in metastore code... IIRC all the MBlah
objects become invalid when detached, which can be an epic PITA. Fixing this
will need some testing.
> Explicitly set pmf.setDetachAllOnCommit on metastore unless configured
> otherwise
> --------------------------------------------------------------------------------
>
> Key: HIVE-11585
> URL: https://issues.apache.org/jira/browse/HIVE-11585
> Project: Hive
> Issue Type: Bug
> Reporter: Sushanth Sowmyan
> Assignee: Sushanth Sowmyan
>
> datanucleus.detachAllOnCommit has a default value of false. However, we've
> observed a number of objects (especially FieldSchema objects) being retained
> that causes us OOM issues on the metastore. Hive should prefer using a
> default of datanucleus.detachAllOnCommit as true, unless otherwise explicitly
> overridden by users.
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