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https://issues.apache.org/jira/browse/YARN-2131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14054439#comment-14054439
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Karthik Kambatla commented on YARN-2131:
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Looks good. +1. 

One nit that I can fix at commit time: rename ZKStore#deleteWithRetriesHelper 
to recursivedeleteWithRetries and add a comment about recursion. 

Also, may be in another JIRA, we should not format if an RM is actively 
running. I am not sure how easy this is, particularly in an HA setting. 

> Add a way to nuke the RMStateStore
> ----------------------------------
>
>                 Key: YARN-2131
>                 URL: https://issues.apache.org/jira/browse/YARN-2131
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.4.0
>            Reporter: Karthik Kambatla
>            Assignee: Robert Kanter
>         Attachments: YARN-2131.patch, YARN-2131.patch
>
>
> There are cases when we don't want to recover past applications, but recover 
> applications going forward. To do this, one has to clear the store. Today, 
> there is no easy way to do this and users should understand how each store 
> works.



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