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https://issues.apache.org/jira/browse/HIVE-16323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16037396#comment-16037396
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Sergey Shelukhin commented on HIVE-16323:
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Also; Hive client is used via a threadlocal. Is sharing metastore client
between threads safe? That exception seems to imply someone closes metastore
client while the pool threads are still running. I am guessing other code
doesn't hit that because it calls getMSC, but the whole thing where some
threads close and null it out and other threads reopen it, seems fragile.
> HS2 JDOPersistenceManagerFactory.pmCache leaks after HIVE-14204
> ---------------------------------------------------------------
>
> Key: HIVE-16323
> URL: https://issues.apache.org/jira/browse/HIVE-16323
> Project: Hive
> Issue Type: Bug
> Components: HiveServer2
> Reporter: Daniel Dai
> Assignee: Daniel Dai
> Attachments: HIVE-16323.1.patch, HIVE-16323.2.patch, PM_leak.png
>
>
> Hive.loadDynamicPartitions creates threads with new embedded rawstore, but
> never close them, thus we leak PersistenceManager one per such thread.
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