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From "Todd Lipcon (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-2229) Deadlock in NameNode
Date Mon, 08 Aug 2011 23:30:28 GMT

    [ https://issues.apache.org/jira/browse/HDFS-2229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13081296#comment-13081296
] 

Todd Lipcon commented on HDFS-2229:
-----------------------------------

I haven't seen this deadlock before, so I don't have any way of verifying that the patch here
fixes the issue. Any idea why the MR cluster launches are triggering this issue reliably but
the HDFS tests are passing fine? (when they launch hundreds of miniclusters)

> Deadlock in NameNode
> --------------------
>
>                 Key: HDFS-2229
>                 URL: https://issues.apache.org/jira/browse/HDFS-2229
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs client
>    Affects Versions: 0.23.0
>            Reporter: Vinod Kumar Vavilapalli
>            Priority: Blocker
>         Attachments: cycle1.png, cycle2.png, h2229_20110807.patch
>
>
> Either I am doing something incredibly stupid, or something about my environment is completely
weird, or may be it really is a valid bug. I am running a NameNode deadlock consistently with
0.23 HDFS. I could never start NN successfully.

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