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https://issues.apache.org/jira/browse/HDFS-2229?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13082780#comment-13082780
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Todd Lipcon commented on HDFS-2229:
-----------------------------------
Hi Nicholas. I'm not sure this fixes the issue - if you look at the stack
trace, initializeReplQueues() is being called by leave() which is also
synchronized on SafeModeInfo.
> 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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