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Posted to hdfs-issues@hadoop.apache.org by "Ajay Kumar (JIRA)" <ji...@apache.org> on 2017/09/12 03:02:00 UTC

[jira] [Updated] (HDFS-12420) Disable Namenode format when data already exists

     [ https://issues.apache.org/jira/browse/HDFS-12420?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ajay Kumar updated HDFS-12420:
------------------------------
    Summary: Disable Namenode format when data already exists  (was: Disallow Namenode format when data already exists)

> 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
>
>
> Disallow 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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