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https://issues.apache.org/jira/browse/HDFS-5124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13747699#comment-13747699
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Jing Zhao commented on HDFS-5124:
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bq. If this happens rapidly enough, then the client could exhaust its max
retries and get an RPC error before the transition to active completes.
Agree. Without the read lock it should be OK when the NN is transitioning from
active to standby, but as Chris said the RPC can fail if the NN is
transitioning to active (the other NN should have been in standby now).
> 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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