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https://issues.apache.org/jira/browse/HIVE-18808?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eugene Koifman reassigned HIVE-18808:
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> Make compaction more robust when stats update fails
> ---------------------------------------------------
>
> Key: HIVE-18808
> URL: https://issues.apache.org/jira/browse/HIVE-18808
> Project: Hive
> Issue Type: Improvement
> Components: Transactions
> Affects Versions: 1.0.0
> Reporter: Eugene Koifman
> Assignee: Eugene Koifman
> Priority: Major
>
>
> Worker.gatherStats() runs a "analyze table..." command to update stats which
> requires SessionState. SessionState objects are cached in ThreadLocal. If
> for some reason Session init fails, it may still get attached to the thread
> which then causes a subsequent request that uses the same tread to gather
> stats fail because it has a bad session object. HIVE-15658 describes the
> same issue in a different context.
> There is currently no way to recycle a session from outside HMS.
> Failure to gather stats should not kill a compaction job which then prevents
> Cleaner from running.
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