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https://issues.apache.org/jira/browse/HIVE-8914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14223400#comment-14223400
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Eugene Koifman commented on HIVE-8914:
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+1
> HDFSCleanup thread holds reference to FileSystem
> ------------------------------------------------
>
> Key: HIVE-8914
> URL: https://issues.apache.org/jira/browse/HIVE-8914
> Project: Hive
> Issue Type: Bug
> Components: WebHCat
> Affects Versions: 0.13.1
> Reporter: shanyu zhao
> Assignee: shanyu zhao
> Attachments: HIVE-8194.1.patch, HIVE-8914.patch
>
>
> WebHCat server has a long running cleanup thread (HDFSCleanup) which holds a
> reference to FileSystem. Because of this reference, many FileSystem related
> objects (e.g. MetricsSystemImpl) cannot be garbage collected. Sometimes this
> causes OOM exception. Since the cleanup is done every 12 hours by default, we
> can simply recreate a FileSystem when we need to use it.
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