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From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-12420) Add an option to disallow 'namenode format -force'
Date Mon, 25 Sep 2017 14:08:00 GMT

    [ https://issues.apache.org/jira/browse/HDFS-12420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16179073#comment-16179073
] 

Daryn Sharp commented on HDFS-12420:
------------------------------------

bq. NameNode format aborted as reform is disabled for this cluster.
# "reform" should be "reformat"
# The conf key description makes reference to "prod".  As Kihwal points out it isn't a universal
term so it should be removed.

+1 after addressing those issues.

> 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
>
>
> 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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