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https://issues.apache.org/jira/browse/HDFS-5585?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kihwal Lee resolved HDFS-5585.
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Resolution: Fixed
Fix Version/s: HDFS-5535 (Rolling upgrades)
Hadoop Flags: Reviewed
Thanks for the review, Vinay and Brandon. I've committed this to the RU branch.
> Provide admin commands for data node upgrade
> --------------------------------------------
>
> Key: HDFS-5585
> URL: https://issues.apache.org/jira/browse/HDFS-5585
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, ha, hdfs-client, namenode
> Reporter: Kihwal Lee
> Assignee: Kihwal Lee
> Fix For: HDFS-5535 (Rolling upgrades)
>
> Attachments: HDFS-5585.patch, HDFS-5585.patch, HDFS-5585.patch
>
>
> Several new methods to ClientDatanodeProtocol may need to be added to support
> querying version, initiating upgrade, etc. The admin CLI needs to be added
> as well. This primary use case is for rolling upgrade, but this can be used
> for preparing for a graceful restart of a data node for any reasons.
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