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https://issues.apache.org/jira/browse/YARN-8581?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16588006#comment-16588006
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Botong Huang commented on YARN-8581:
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Thanks [~giovanni.fumarola] for the review!
> [AMRMProxy] Add sub-cluster timeout in LocalityMulticastAMRMProxyPolicy
> -----------------------------------------------------------------------
>
> Key: YARN-8581
> URL: https://issues.apache.org/jira/browse/YARN-8581
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: amrmproxy, federation
> Reporter: Botong Huang
> Assignee: Botong Huang
> Priority: Major
> Attachments: YARN-8581-branch-2.v2.patch, YARN-8581.v1.patch,
> YARN-8581.v2.patch
>
>
> In Federation, every time an AM heartbeat comes in,
> LocalityMulticastAMRMProxyPolicy in AMRMProxy splits the asks according to
> the list of active and enabled sub-clusters. However, if we haven't been able
> to heartbeat to a sub-cluster for some time (network issues, or we keep
> hitting some exception from YarnRM, or YarnRM master-slave switch is taking a
> long time etc.), we should consider the sub-cluster as unhealthy and stop
> routing asks there, until the heartbeat channel becomes healthy again.
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