Separate application-init and container-init event types in NM's 
ApplicationImpl FSM
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                 Key: MAPREDUCE-3162
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-3162
             Project: Hadoop Map/Reduce
          Issue Type: Improvement
    Affects Versions: 0.23.0
            Reporter: Todd Lipcon
            Assignee: Todd Lipcon
            Priority: Minor


Currently, the ApplicationImpl receives an INIT_APPLICATION event on every 
container initialization. Only on the first one does it really mean to init the 
application, whereas all subsequent events are for specific containers. This 
JIRA is to separate the events into INIT_APPLICATION, sent once and only once 
per application, and INIT_CONTAINER, which is sent for every container. The 
first container sends INIT_APPLICATION followed by INIT_CONTAINER.

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