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https://issues.apache.org/jira/browse/HDFS-2030?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13046826#comment-13046826
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Suresh Srinivas commented on HDFS-2030:
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+1 for the change
> Fix the usability of namenode upgrade command
> ---------------------------------------------
>
> Key: HDFS-2030
> URL: https://issues.apache.org/jira/browse/HDFS-2030
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 0.23.0
> Reporter: Bharath Mundlapudi
> Assignee: Bharath Mundlapudi
> Priority: Minor
> Fix For: 0.23.0
>
> Attachments: HDFS-2030-1.patch, HDFS-2030-2.patch, HDFS-2030-3.patch
>
>
> Fixing the Namenode upgrade option along the same line as Namenode format
> option.
> If clusterid is not given then clusterid will be automatically generated for
> the upgrade but if clusterid is given then it will be honored.
>
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