[jira] [Commented] (HBASE-20109) Add Admin#getMaster API to branch-1

["Andrew Purtell (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-20109?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16383024#comment-16383024 ] 

Andrew Purtell commented on HBASE-20109:
----------------------------------------

Really simple patch, done very similar to existing code. Good for branch-1. 

> Add Admin#getMaster API to branch-1
> -----------------------------------
>
>                 Key: HBASE-20109
>                 URL: https://issues.apache.org/jira/browse/HBASE-20109
>             Project: HBase
>          Issue Type: Improvement
>          Components: Client
>    Affects Versions: 1.4.2
>            Reporter: Andrew Purtell
>            Assignee: Andrew Purtell
>            Priority: Minor
>             Fix For: 1.5.0
>
>         Attachments: HBASE-20109-branch-1.patch
>
>
> Right now the only public API available in branch-1 to the client to learn the server name of the active master is Admin#getClusterStatus#getMaster, returning ServerName. On a cluster of any size getClusterStatus is expensive, especially if used only to retrieve the active master name. 
> Later versions have
> {code}
> ServerName Admin#getMaster()
> {code}
> for lightweight discovery of the active master location. Add this to branch-1.



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