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https://issues.apache.org/jira/browse/HDFS-12420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16184464#comment-16184464
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Daryn Sharp commented on HDFS-12420:
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Looks good. Is the error message output twice? It's logging and throwing so
presumably something at a higher level will log it again. It's usually an
anti-pattern to log/throw for that reason, versus logging in the catch block
that actually handles the exception w/o re-throwing. Not that I care much. +1
> Add an option to disallow 'namenode format -force'
> --------------------------------------------------
>
> Key: HDFS-12420
> URL: https://issues.apache.org/jira/browse/HDFS-12420
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Ajay Kumar
> Assignee: Ajay Kumar
> Attachments: HDFS-12420.01.patch, HDFS-12420.02.patch,
> HDFS-12420.03.patch, HDFS-12420.04.patch, HDFS-12420.05.patch,
> HDFS-12420.06.patch, HDFS-12420.07.patch, HDFS-12420.08.patch,
> HDFS-12420.09.patch, HDFS-12420.10.patch, HDFS-12420.11.patch
>
>
> Support for disabling NameNode format to avoid accidental formatting of
> Namenode in production cluster. If someone really wants to delete the
> complete fsImage, they can first delete the metadata dir and then run {code}
> hdfs namenode -format{code} manually.
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