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https://issues.apache.org/jira/browse/HDFS-8110?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Akira AJISAKA updated HDFS-8110:
--------------------------------
Resolution: Fixed
Fix Version/s: 3.0.0
Status: Resolved (was: Patch Available)
Committed this to trunk. Thanks [~andreina] for the contribution.
> Remove unsupported 'hdfs namenode -rollingUpgrade downgrade' from document
> --------------------------------------------------------------------------
>
> Key: HDFS-8110
> URL: https://issues.apache.org/jira/browse/HDFS-8110
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: documentation
> Reporter: J.Andreina
> Assignee: J.Andreina
> Priority: Minor
> Fix For: 3.0.0
>
> Attachments: HDFS-8110.1.patch
>
>
> Support for "-rollingUpgrade downgrade" is been removed as part of HDFS-7302.
> Corresponding information should be removed from document also.
> {noformat}
> Downgrade with Downtime
> Administrator may choose to first shutdown the cluster and then downgrade it.
> The following are the steps:
> Shutdown all NNs and DNs.
> Restore the pre-upgrade release in all machines.
> Start NNs with the "-rollingUpgrade downgrade" option.
> Start DNs normally.
> {noformat}
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