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Posted to dev@hive.apache.org by "shanyu zhao (JIRA)" <ji...@apache.org> on 2014/11/19 17:36:34 UTC

[jira] [Created] (HIVE-8914) HDFSCleanup thread holds reference to FileSystem

shanyu zhao created HIVE-8914:
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             Summary: 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


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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