Daniel Templeton commented on YARN-5685:

Now that I've worked out the kinks on YARN-5677 and YARN-5694, I think the 
correct approach here is to deprecate the embedded property and complain loudly 
if anyone sets it to false, e.g. fail.  That's much preferable to coming up 
with all RMs in standby.  Unless someone disagrees, I'll post a patch for that 

> Non-embedded HA failover is broken
> ----------------------------------
>                 Key: YARN-5685
>                 URL: https://issues.apache.org/jira/browse/YARN-5685
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.9.0, 3.0.0-alpha1
>            Reporter: Daniel Templeton
>            Assignee: Daniel Templeton
>            Priority: Critical
> If HA is enabled with automatic failover enabled and embedded failover 
> disabled, all RMs all come up in standby state.  To make one of them active, 
> the {{--forcemanual}} flag must be used when manually triggering the state 
> change.  Should the active go down, the standby will not become active and 
> must be manually transitioned with the {{--forcemanual}} flag.

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