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https://issues.apache.org/jira/browse/HDFS-5124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13747742#comment-13747742
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Chris Nauroth commented on HDFS-5124:
-------------------------------------
Let's add a comment. It's non-obvious that we're holding the namesystem lock
to coordinate with an HA failover, especially considering that there is no
actual namesystem manipulation like Daryn pointed out. :-)
> Namenode in secure cluster deadlocks
> ------------------------------------
>
> Key: HDFS-5124
> URL: https://issues.apache.org/jira/browse/HDFS-5124
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Affects Versions: 2.1.1-beta
> Environment: Secure Hadoop 2 cluster
> Reporter: Deepesh Khandelwal
> Assignee: Jing Zhao
> Priority: Blocker
> Attachments: HADOOP-5124.patch, HDFS-5124.001.patch,
> HDFS-5124.002.patch, nn_jstack.out
>
>
> Namenode deadlocks after a while in use.
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