Allen Wittenauer updated YARN-121:
    Fix Version/s:     (was: 3.0.0)

> Yarn services to throw a YarnException on invalid state changs
> --------------------------------------------------------------
>                 Key: YARN-121
>                 URL: https://issues.apache.org/jira/browse/YARN-121
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>   Original Estimate: 0.5h
>  Remaining Estimate: 0.5h
> the {{EnsureCurrentState()}} checks of services throw an 
> {{IllegalStateException}}  if the state is wrong. If this was changed to 
> {{YarnException}}. wrapper services such as CompositeService could relay this 
> direct, instead of wrapping it in their own.
> Time to implement mainly in changing the lifecycle test cases of 
> MAPREDUCE-3939 subtasks.

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