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https://issues.apache.org/jira/browse/HIVE-8914?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eugene Koifman resolved HIVE-8914.
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    Resolution: Fixed

Thanks for the contribution [~shanyu]

> 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
>             Fix For: 0.15.0
>
>         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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