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https://issues.apache.org/jira/browse/YARN-4024?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14731754#comment-14731754
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Hudson commented on YARN-4024:
------------------------------

SUCCESS: Integrated in Hadoop-Mapreduce-trunk #2298 (See 
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/2298/])
YARN-4024. YARN RM should avoid unnecessary resolving IP when NMs doing 
heartbeat. (Hong Zhiguo via wangda) (wangda: rev 
bcc85e3bab78bcacd430eac23141774465b96ef9)
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/resources/yarn-default.xml
* hadoop-yarn-project/CHANGES.txt
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api/src/main/java/org/apache/hadoop/yarn/conf/YarnConfiguration.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/rmapp/TestNodesListManager.java
* 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/NodesListManager.java


> 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
>          Components: resourcemanager
>            Reporter: Wangda Tan
>            Assignee: Hong Zhiguo
>             Fix For: 2.8.0
>
>         Attachments: YARN-4024-draft-v2.patch, YARN-4024-draft-v3.patch, 
> YARN-4024-draft.patch, YARN-4024-v4.patch, YARN-4024-v5.patch, 
> YARN-4024-v6.patch, YARN-4024-v7.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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