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https://issues.apache.org/jira/browse/HDFS-7302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14342941#comment-14342941
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Kai Sasaki commented on HDFS-7302:
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[~szetszwo] I updated patch. Can you review it? Thank you.
> namenode -rollingUpgrade downgrade may finalize a rolling upgrade
> -----------------------------------------------------------------
>
> Key: HDFS-7302
> URL: https://issues.apache.org/jira/browse/HDFS-7302
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: namenode
> Reporter: Tsz Wo Nicholas Sze
> Assignee: Kai Sasaki
> Labels: document, hdfs
> Attachments: HADOOP-7302.1.patch, HDFS-7302.2.patch, HDFS-7302.3.patch
>
>
> The namenode startup option "-rollingUpgrade downgrade" is originally
> designed for downgrading cluster. However, running "namenode -rollingUpgrade
> downgrade" with the new software could result in finalizing the ongoing
> rolling upgrade.
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