sandflee commented on YARN-3668:

If am crashed and reaches am max fail times, applications are killed. If we set 
am max fail times to a big one or unlimit am max fail times, RM may have too 
many AppAttempt to store in memory and RMStateStore, YARN-3480 could resolve 
this problem by storing limited appAttempt.

> Long run service shouldn't be killed even if Yarn crashed
> ---------------------------------------------------------
>                 Key: YARN-3668
>                 URL: https://issues.apache.org/jira/browse/YARN-3668
>             Project: Hadoop YARN
>          Issue Type: Wish
>            Reporter: sandflee
> For long running service, it shouldn't be killed even if all yarn component 
> crashed, with RM work preserving and NM restart, yarn could take over 
> applications again.

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