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https://issues.apache.org/jira/browse/YARN-3893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14708470#comment-14708470
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Rohith Sharma K S commented on YARN-3893:
-----------------------------------------

I had closer look at either of the solutions as above. One of the potential 
issue in both are
# Moving createAndInitService just before starting activeServices in 
transitionToActive. 
## switch time will be impacted since every transitionToActive initializes 
active services.
## And RMWebApp has dependency on clienRMService for starting webapps. Without 
clientRMService initialization, RMWebapp can not be started. 
# Moving refreshAll before transitionToActive in adminService is same as 
triggering RMAdminCIi on standby node. This call throw StandByException and 
retried to active RM in RMAdminCli. When it comes to  
AdminService#transitionedToActive(), refreshing before 
{{rm.transitionedToActive}} throws an standby exception. 



> Both RM in active state when Admin#transitionToActive failure from refeshAll()
> ------------------------------------------------------------------------------
>
>                 Key: YARN-3893
>                 URL: https://issues.apache.org/jira/browse/YARN-3893
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>    Affects Versions: 2.7.1
>            Reporter: Bibin A Chundatt
>            Assignee: Bibin A Chundatt
>            Priority: Critical
>         Attachments: 0001-YARN-3893.patch, 0002-YARN-3893.patch, 
> 0003-YARN-3893.patch, 0004-YARN-3893.patch, yarn-site.xml
>
>
> Cases that can cause this.
> # Capacity scheduler xml is wrongly configured during switch
> # Refresh ACL failure due to configuration
> # Refresh User group failure due to configuration
> Continuously both RM will try to be active
> {code}
> dsperf@host-10-128:/opt/bibin/dsperf/OPENSOURCE_3_0/install/hadoop/resourcemanager/bin>
>  ./yarn rmadmin  -getServiceState rm1
> 15/07/07 19:08:10 WARN util.NativeCodeLoader: Unable to load native-hadoop 
> library for your platform... using builtin-java classes where applicable
> active
> dsperf@host-128:/opt/bibin/dsperf/OPENSOURCE_3_0/install/hadoop/resourcemanager/bin>
>  ./yarn rmadmin  -getServiceState rm2
> 15/07/07 19:08:12 WARN util.NativeCodeLoader: Unable to load native-hadoop 
> library for your platform... using builtin-java classes where applicable
> active
> {code}
> # Both Web UI active
> # Status shown as active for both RM



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