Jian He commented on YARN-4438:

bq. Otherwise, the clients (and their individual timeouts etc.) could lead to 
agree, I was actually talking about the same with [~xgong] offline, didn't do 
that just because wanted to keep the change minimal. I'll make the change 
bq. Would it be possible to hide the implementation of the leader-election - 
ActiveStandbyElector vs CuratorElector - behind EmbeddedElector?
I'm thinking to remove EmbeddedElectorService later on and separate the 
LeaderElectorService out from the AdminService. does that make sense ?

> Implement RM leader election with curator
> -----------------------------------------
>                 Key: YARN-4438
>                 URL: https://issues.apache.org/jira/browse/YARN-4438
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Jian He
>            Assignee: Jian He
>         Attachments: YARN-4438.1.patch
> This is to implement the leader election with curator instead of the 
> ActiveStandbyElector from common package,  this also avoids adding more 
> configs in common to suit RM's own needs. 

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