Anubhav Dhoot created YARN-2196:

             Summary: Add Application duplicate APP_ACCEPTED events can be 
prevented with a flag 
                 Key: YARN-2196
             Project: Hadoop YARN
          Issue Type: Bug
    Affects Versions: 2.4.0
            Reporter: Anubhav Dhoot

YARN-1365 adds a flag to AddApplicationAttemptSchedulerEvent that prevents a 
duplicate ATTEMPT_ADDED event  in recovery. We can do something similar to 
AddApplicationSchedulerEvent to avoid the following transition.
// ACCECPTED state can once again receive APP_ACCEPTED event, because on
    // recovery the app returns ACCEPTED state and the app once again go
    // through the scheduler and triggers one more APP_ACCEPTED event at
    // ACCEPTED state.
    .addTransition(RMAppState.ACCEPTED, RMAppState.ACCEPTED,

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