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From "Kihwal Lee (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-8050) Deadlock in metrics
Date Mon, 13 Feb 2012 13:36:59 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-8050?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kihwal Lee updated HADOOP-8050:
-------------------------------

    Attachment: hadoop-8050-trunk.patch.txt
                hadoop-8050-branch-1.patch.txt

Thanks for the review, Luke. I removed the unused variable in the new patches. Attaching patches
for branch-1 and trunk.
                
> Deadlock in metrics
> -------------------
>
>                 Key: HADOOP-8050
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8050
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: metrics
>    Affects Versions: 0.20.204.0, 0.20.205.0, 0.23.0, 1.0.0
>            Reporter: Kihwal Lee
>            Assignee: Kihwal Lee
>             Fix For: 1.1.0, 1.0.1
>
>         Attachments: hadoop-8050-branch-1.patch.txt, hadoop-8050-branch-1.patch.txt,
hadoop-8050-branch-1.patch.txt, hadoop-8050-branch-1.patch.txt, hadoop-8050-trunk.patch.txt,
hadoop-8050-trunk.patch.txt, hadoop-8050-trunk.patch.txt, hadoop-8050.patch.txt
>
>
> The metrics serving thread and the periodic snapshot thread can deadlock.
> It happened a few times on one of namenodes we have. When it happens RPC works but the
web ui and hftp stop working. I haven't look at the trunk too closely, but it might happen
there too.

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