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https://issues.apache.org/jira/browse/HDFS-2413?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13238649#comment-13238649
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Aaron T. Myers commented on HDFS-2413:
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bq. Since this is a new API, we are not sure if want to change it. Let's leave 
it as-is for the moment.

Works for me. Thanks for thinking about it.

Nicholas, would you like to commit this patch or shall I? We should also 
probably update the target version to 0.23.3 instead of 0.23.2.
                
> Add public APIs for safemode
> ----------------------------
>
>                 Key: HDFS-2413
>                 URL: https://issues.apache.org/jira/browse/HDFS-2413
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: hdfs client
>    Affects Versions: 0.23.0
>            Reporter: Todd Lipcon
>            Assignee: Harsh J
>         Attachments: HDFS-2413.patch, HDFS-2413.patch, HDFS-2413.patch, 
> HDFS-2413.patch
>
>
> Currently the APIs for safe-mode are part of DistributedFileSystem, which is 
> supposed to be a private interface. However, dependent software often wants 
> to wait until the NN is out of safemode. Though it could poll trying to 
> create a file and catching SafeModeException, we should consider making some 
> of these APIs public.

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