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https://issues.apache.org/jira/browse/HDFS-2229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13081428#comment-13081428
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Vinod Kumar Vavilapalli commented on HDFS-2229:
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bq. 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)
My setup is trunk code with security enabled on a real cluster (not single
node).
I haven't had time to run it again with the attached patch. Will report soon
once I get around to it.
> 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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