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https://issues.apache.org/jira/browse/YARN-3809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14594300#comment-14594300
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Jun Gong commented on YARN-3809:
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[~jlowe] Thank you for the very detailed suggestions. It helps me a lot.
I will update patch to address your suggestions. I find it might be better to
change config in ApplicationMasterLauncher#serviceInit, then we just need
change it one time, all newly created AMLauncher will use this config.
> Failed to launch new attempts because ApplicationMasterLauncher's threads all
> hang
> ----------------------------------------------------------------------------------
>
> Key: YARN-3809
> URL: https://issues.apache.org/jira/browse/YARN-3809
> Project: Hadoop YARN
> Issue Type: Improvement
> Components: resourcemanager
> Reporter: Jun Gong
> Assignee: Jun Gong
> Attachments: YARN-3809.01.patch, YARN-3809.02.patch
>
>
> ApplicationMasterLauncher create a thread pool whose size is 10 to deal with
> AMLauncherEventType(LAUNCH and CLEANUP).
> In our cluster, there was many NM with 10+ AM running on it, and one shut
> down for some reason. After RM found the NM LOST, it cleaned up AMs running
> on it. Then ApplicationMasterLauncher need handle these 10+ CLEANUP event.
> ApplicationMasterLauncher's thread pool would be filled up, and they all hang
> in the code containerMgrProxy.stopContainers(stopRequest) because NM was
> down, the default RPC time out is 15 mins. It means that in 15 mins
> ApplicationMasterLauncher could not handle new event such as LAUNCH, then new
> attempts will fails to launch because of time out.
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