Junping Du commented on YARN-3173:

Setup RM HA also involve other manual steps, e.g. start ZK server, etc., so I 
am not sure how things proposed here help too much especially it need ssh login 
between active RM and standby RM. [~xgong], do you have any comments here?

> start-yarn.sh script  can't aware how many RMs to be started.
> -------------------------------------------------------------
>                 Key: YARN-3173
>                 URL: https://issues.apache.org/jira/browse/YARN-3173
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 3.0.0
>            Reporter: BOB
>            Priority: Minor
> When config more than one RM, for example in the HA cluster, using the 
> start-yarn.sh script to start yarn cluster,but the cluster only start up with 
> one resourcemanager  on the node which start-yarn.sh be executed. I think 
> yarn should sense how many RMs been configured at the beginning, and start 
> them all in start-yarn.sh script. 

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