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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-12420.03.patch
[~jnp],[~vinayrpet], thanks for suggestion about prod/non-prod.
[~aw],[~anu],[~arpitagarwal] thanks for valuable feedback. I have updated the
patch to include a new property to identify if cluster is marked as prod. By
default property value is false and existing functionality will continue.
> Disable Namenode format 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
>
>
> 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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