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https://issues.apache.org/jira/browse/AMBARI-1636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13601922#comment-13601922
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Mahadev konar commented on AMBARI-1636:
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Agreed! This will be really nice/important improvement to have. 
                
> Automatically add "stragglers" (unavailable) machines to a cluster after 
> initial set up
> ---------------------------------------------------------------------------------------
>
>                 Key: AMBARI-1636
>                 URL: https://issues.apache.org/jira/browse/AMBARI-1636
>             Project: Ambari
>          Issue Type: Improvement
>          Components: controller
>            Reporter: Mitch Wyle
>
> In “the real world” large Hadoop clusters will always have hosts that are 
> down, unavailable, or experiencing transient failures.  Robust, mature, 
> recovery-oriented distributed systems such as Ambari should always recover 
> from these transient failures automatically without human intervention (zero 
> touch).  Consider polling periodically for missing nodes that were not set up 
> initially and adding them as they appear.

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