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https://issues.apache.org/jira/browse/YARN-3480?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15067143#comment-15067143
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Jian He commented on YARN-3480:
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Hi [~hex108], thanks for updating.
bq. If RMStateStore fails to persist any attempt, it will transition to state 
'RMStateStoreState.FENCED'. 
I think this is not true if HA is not enabled. 
If HA is not enabled and fail-fast is false, state-store will remain at ACTIVE 
state. below code in RMStateStore class
{code}
 } else if (YarnConfiguration.shouldRMFailFast(getConfig())) {
{code}

> Recovery may get very slow with lots of services with lots of app-attempts
> --------------------------------------------------------------------------
>
>                 Key: YARN-3480
>                 URL: https://issues.apache.org/jira/browse/YARN-3480
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: resourcemanager
>    Affects Versions: 2.6.0
>            Reporter: Jun Gong
>            Assignee: Jun Gong
>         Attachments: YARN-3480.01.patch, YARN-3480.02.patch, 
> YARN-3480.03.patch, YARN-3480.04.patch, YARN-3480.05.patch, 
> YARN-3480.06.patch, YARN-3480.07.patch, YARN-3480.08.patch, 
> YARN-3480.09.patch, YARN-3480.10.patch, YARN-3480.11.patch
>
>
> When RM HA is enabled and running containers are kept across attempts, apps 
> are more likely to finish successfully with more retries(attempts), so it 
> will be better to set 'yarn.resourcemanager.am.max-attempts' larger. However 
> it will make RMStateStore(FileSystem/HDFS/ZK) store more attempts, and make 
> RM recover process much slower. It might be better to set max attempts to be 
> stored in RMStateStore.
> BTW: When 'attemptFailuresValidityInterval'(introduced in YARN-611) is set to 
> a small value, retried attempts might be very large. So we need to delete 
> some attempts stored in RMStateStore and RMStateStore.



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