[jira] [Closed] (HDFS-3646) LeaseRenewer can hold reference to inactive DFSClient instances forever

["Arun C Murthy (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-3646?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arun C Murthy closed HDFS-3646.
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> LeaseRenewer can hold reference to inactive DFSClient instances forever
> -----------------------------------------------------------------------
>
>                 Key: HDFS-3646
>                 URL: https://issues.apache.org/jira/browse/HDFS-3646
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs client
>    Affects Versions: 0.23.3, 2.0.0-alpha
>            Reporter: Kihwal Lee
>            Assignee: Kihwal Lee
>            Priority: Critical
>             Fix For: 0.23.3, 2.0.2-alpha
>
>         Attachments: hdfs-3646-branch-23.patch.txt, hdfs-3646-branch-23.patch.txt, hdfs-3646.patch, hdfs-3646.patch.txt, hdfs-3646.patch.txt
>
>
> If {{LeaseRenewer#closeClient()}} is not called, {{LeaseRenewer}} keeps the reference to a {{DFSClient}} instance in {{dfsclients}} forever. This prevents {{DFSClient}}, {{LeaseRenewer}}, conf, etc. from being garbage collected, leading to memory leak.
> {{LeaseRenewer}} should remove the reference after some delay, if a {{DFSClient}} instance no longer has active streams.

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