Karthik Kambatla commented on YARN-2136:

bq. On a second check, state-store is actually already stopped/closed when RM 
gets fenced, which means no more store operation can be performed once RM gets 
fenced. Karthik Kambatla, is this the case?
Yes. That is correct. 

I was open to adding the FENCED state to future-proof against us not stopping 
the store when RM transitions to Standby, but I agree we could probably look 
into this when we get there. 

> RMStateStore can explicitly handle store/update events when fenced
> ------------------------------------------------------------------
>                 Key: YARN-2136
>                 URL: https://issues.apache.org/jira/browse/YARN-2136
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Jian He
> RMStateStore can choose to handle/ignore store/update events upfront instead 
> of invoking more ZK operations if state store is at fenced state. 

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