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https://issues.apache.org/jira/browse/YARN-4024?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14705403#comment-14705403
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Wangda Tan commented on YARN-4024:
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[~zhiguohong], thanks for update, patch generally looks good, could you take a
look at findbugs warning?
bq. FindBugs module:hadoop-yarn-server-resourcemanager
Sometimes it shows 0 findbugs when you click at the findbugs report link, but
it has some bugs. You can go to yarn-resourcemanager project to run "mvn clean
findbugs:findbugs".
> 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: Improvement
> Reporter: Wangda Tan
> Assignee: Hong Zhiguo
> Attachments: YARN-4024-draft-v2.patch, YARN-4024-draft-v3.patch,
> YARN-4024-draft.patch, YARN-4024-v4.patch, YARN-4024-v5.patch
>
>
> 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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