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https://issues.apache.org/jira/browse/YARN-4024?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14660595#comment-14660595
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Wangda Tan commented on YARN-4024:
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[~zhiguohong], I noticed YARN-4001 after filed YARN-4024, since we have some
discussions on YARN-4024 already. I suggest to close YARN-4001 and feel free to
assign this one to you.
> YARN RM should avoid unnecessary resolving IP when NMs doing heartbeat
> ----------------------------------------------------------------------
>
> Key: YARN-4024
> URL: https://issues.apache.org/jira/browse/YARN-4024
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Wangda Tan
>
> Currently, YARN RM NodesListManager will resolve IP address every time when
> node doing heartbeat. When DNS server becomes slow, NM heartbeat will be
> blocked and cannot make progress.
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