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https://issues.apache.org/jira/browse/HDFS-12420?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ajay Kumar updated HDFS-12420:
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Attachment: HDFS-12420.08.patch
[~arpitagarwal], Thanks for review. Patch v8 has following suggested changes:
* Updated WebHDFS.md usage for format
* config name change from {{hdfs.reformat.enabled}} to {{dfs.reformat.enabled}}
* changed test case name
> Disable Namenode format for prod clusters when data already exists
> ------------------------------------------------------------------
>
> 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
>
>
> Disable 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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