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https://issues.apache.org/jira/browse/HDFS-8110?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14512419#comment-14512419
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Hudson commented on HDFS-8110:
------------------------------
FAILURE: Integrated in Hadoop-Yarn-trunk #908 (See
[https://builds.apache.org/job/Hadoop-Yarn-trunk/908/])
HDFS-8110. Remove unsupported 'hdfs namenode -rollingUpgrade downgrade' from
document. Contributed by J.Andreina. (aajisaka: rev
91b97c21c9271629dae7515a6a58c35d13b777ff)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
* hadoop-hdfs-project/hadoop-hdfs/src/site/xdoc/HdfsRollingUpgrade.xml
> 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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