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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 updated HDFS-5585:
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Description: 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. (was: 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.)
> 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
>
> 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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