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https://issues.apache.org/jira/browse/HIVE-13151?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15166489#comment-15166489
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Wei Zheng commented on HIVE-13151:
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To be specific, if we don't clean up the UGI info, we will end up having a lot
of FileSystem$Cache$Key entries.
> Clean up UGI objects in FileSystem cache for transactions
> ---------------------------------------------------------
>
> Key: HIVE-13151
> URL: https://issues.apache.org/jira/browse/HIVE-13151
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Affects Versions: 2.0.0
> Reporter: Wei Zheng
> Assignee: Wei Zheng
>
> One issue with FileSystem.CACHE is that it does not clean itself. The key in
> that cache includes UGI object. When new UGI objects are created and used
> with the FileSystem api, new entries get added to the cache.
> We need to manually clean up those UGI objects once they are no longer in use.
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