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https://issues.apache.org/jira/browse/HDFS-7302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14338579#comment-14338579
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Tsz Wo Nicholas Sze commented on HDFS-7302:
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Thanks for the new patch. Some comments:
- Need to fix TestRollingUpgradeDowngrade.
- The was a typo in [one of my previous
comments|https://issues.apache.org/jira/browse/HDFS-7302?focusedCommentId=14334532&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14334532]:
"a ongoing" should be "an ongoing".
- Please add a full stop in the sentence below.
{code}
+ It is not necessary to start namenode with downgrade options explicitly
{code}
> 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
>
>
> 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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