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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-1840) Terminate LeaseChecker when all writing files are closed.
Date Wed, 27 Apr 2011 19:32:03 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1840?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13025968#comment-13025968
] 

Tsz Wo (Nicholas), SZE commented on HDFS-1840:
----------------------------------------------

Yes, we have seen this but we do not have 40k+ threads, probably only a few hundreds.

> ... (0.23 is like a couple years away) ...

Hopefully, it is only a a couple months away.

> Terminate LeaseChecker when all writing files are closed.
> ---------------------------------------------------------
>
>                 Key: HDFS-1840
>                 URL: https://issues.apache.org/jira/browse/HDFS-1840
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs client
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Tsz Wo (Nicholas), SZE
>             Fix For: 0.23.0
>
>         Attachments: h1840_20110418.patch, h1840_20110419.patch, h1840_20110419b.patch
>
>
> In {{DFSClient}}, when there are files opened for write, a {{LeaseChecker}} thread is
started for updating the leases periodically.  However, it never terminates when when all
writing files are closed.

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