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https://issues.apache.org/jira/browse/YARN-3094?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14660694#comment-14660694
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Siqi Li commented on YARN-3094:
-------------------------------
The latest patch can be applied to 2.6.0 branch cleanly
> reset timer for liveness monitors after RM recovery
> ---------------------------------------------------
>
> Key: YARN-3094
> URL: https://issues.apache.org/jira/browse/YARN-3094
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 2.6.0
> Reporter: Jun Gong
> Assignee: Jun Gong
> Labels: 2.6.1-candidate
> Fix For: 2.7.0
>
> Attachments: YARN-3094.2.patch, YARN-3094.3.patch, YARN-3094.4.patch,
> YARN-3094.5.patch, YARN-3094.patch
>
>
> When RM restarts, it will recover RMAppAttempts and registry them to
> AMLivenessMonitor if they are not in final state. AM will time out in RM if
> the recover process takes long time due to some reasons(e.g. too many apps).
> In our system, we found the recover process took about 3 mins, and all AM
> time out.
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