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https://issues.apache.org/jira/browse/AMBARI-10879?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14522933#comment-14522933
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Jayush Luniya commented on AMBARI-10879:
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commit 53c5b621a80fcd1ff6450948875071938f063419
Author: Jayush Luniya <[email protected]>
Date:   Fri May 1 01:22:46 2015 -0700

    AMBARI-10879: If hostname used by agents is upper-case or mixed-case then 
upgrading to Ambari-2.0 may create issues (jluniya)

> If hostname used by agents is upper-case or mixed-case then upgrading to 
> Ambari-2.0 may create issues
> -----------------------------------------------------------------------------------------------------
>
>                 Key: AMBARI-10879
>                 URL: https://issues.apache.org/jira/browse/AMBARI-10879
>             Project: Ambari
>          Issue Type: Task
>          Components: ambari-agent, ambari-server
>    Affects Versions: 2.0.0
>            Reporter: Jayush Luniya
>            Priority: Critical
>             Fix For: 2.1.0
>
>
> As part of the Windows support, in 2.0. agent code converts hostnames to 
> lowercase. If some hosts are registered with mixed-case hostnames then after 
> upgrade the agents will not be recognized resulting in Hearbeat lost.



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