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https://issues.apache.org/jira/browse/HBASE-26231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17406203#comment-17406203
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Duo Zhang commented on HBASE-26231:
-----------------------------------

After reconsideration, if we do not make MasterRpcServices implement 
AdminService, it will cause incompatible issues betweem client and server.

So FWIW, we still need to make MasterRpcServices implement AdminService for at 
least the whole 3.x lifecycle, so let's just make use of the 
updateConfiguration method in it, and just throw unsupported operation 
exception for other methods.

> Add an updateConfiguration rpc method in MasterService
> ------------------------------------------------------
>
>                 Key: HBASE-26231
>                 URL: https://issues.apache.org/jira/browse/HBASE-26231
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Duo Zhang
>            Priority: Major
>
> Concurrently it is only in AdminService which is for region server only, but 
> we still need to have the updateConfiguration method to update the 
> configuration for HMaster.



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