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From "Rushabh S Shah (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12420) Disable Namenode format when data already exists
Date Tue, 12 Sep 2017 14:58:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16163071#comment-16163071
] 

Rushabh S Shah commented on HDFS-12420:
---------------------------------------

[~ajaykumar] Can you please write a test case for the new behavior ?

> 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
>
>
> 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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