Jian He commented on YARN-2074:

bq. Use this condition to decide whether this RMAppAttempt is isLastAttempt
Actually the isLastAttempt boolean is not used for determining whether to 
restart the AM , the method getAttemptFailureCount is used to do that. Will 
rename this boolean flag to avoid confusion.
bq. maybe we could use a more general way to check whether the AM is 
isPreempted, (check ContainerExitStatus instead
 thinking about this. To do this we need to persist the ContainerExitStatus in 
state store also.

> Preemption of AM containers shouldn't count towards AM failures
> ---------------------------------------------------------------
>                 Key: YARN-2074
>                 URL: https://issues.apache.org/jira/browse/YARN-2074
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>            Reporter: Vinod Kumar Vavilapalli
>            Assignee: Jian He
>         Attachments: YARN-2074.1.patch, YARN-2074.2.patch
> One orthogonal concern with issues like YARN-2055 and YARN-2022 is that AM 
> containers getting preempted shouldn't count towards AM failures and thus 
> shouldn't eventually fail applications.
> We should explicitly handle AM container preemption/kill as a separate issue 
> and not count it towards the limit on AM failures.

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