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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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J.Andreina updated HDFS-8110:
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Attachment: HDFS-8110.1.patch
Attached an initial patch for this issue.
Please review.
> Remove unsupported operation , -rollingUpgrade downgrade related information
> 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
> 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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