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https://issues.apache.org/jira/browse/HDFS-7533?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kihwal Lee updated HDFS-7533:
-----------------------------
Resolution: Fixed
Fix Version/s: 2.7.0
Hadoop Flags: Reviewed
Status: Resolved (was: Patch Available)
Thanks for fixing this, Eric.
> Datanode sometimes does not shutdown on receiving upgrade shutdown command
> --------------------------------------------------------------------------
>
> Key: HDFS-7533
> URL: https://issues.apache.org/jira/browse/HDFS-7533
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Kihwal Lee
> Assignee: Eric Payne
> Fix For: 2.7.0
>
> Attachments: HDFS-7533.v1.txt
>
>
> When datanode is told to shutdown via the dfsadmin command during rolling
> upgrade, it may not shutdown. This is because not all writers have responder
> running, but sendOOB() tries anyway. This causes NPE and the shutdown thread
> dies, halting the shutdown after only shutting down DataXceiverServer.
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