zhihai xu created YARN-4209:

             Summary: RMStateStore FENCED state doesn’t work
                 Key: YARN-4209
                 URL: https://issues.apache.org/jira/browse/YARN-4209
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
    Affects Versions: 2.7.1
            Reporter: zhihai xu
            Assignee: zhihai xu
            Priority: Critical

RMStateStore FENCED state doesn’t work. The reason is
{{stateMachine.doTransition}} called from {{updateFencedState}} is embedded in 
{{stateMachine.doTransition}} called from public 
API(removeRMDelegationToken...) or {{ForwardingEventHandler#handle}}. So right 
after the internal state transition from {{updateFencedState}} changes the 
state to FENCED state, the external state transition changes the state back to 
ACTIVE state. The end result is that RMStateStore is still in ACTIVE state even 
notifyStoreOperationFailed is called. The only working case for FENCED state is 
{{notifyStoreOperationFailed}} called from 
For example: {{removeRMDelegationToken}} => {{handleStoreEvent}} => enter 
external {{stateMachine.doTransition}} => {{RemoveRMDTTransition}} => 
{{notifyStoreOperationFailed}} =>{{updateFencedState}}=>{{handleStoreEvent}}=> 
enter internal {{stateMachine.doTransition}} => exit internal 
{{stateMachine.doTransition}} change state to FENCED => exit external 
{{stateMachine.doTransition}} change state to ACTIVE.

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