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