[ 
https://issues.apache.org/jira/browse/YARN-4024?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14707475#comment-14707475
 ] 

Hadoop QA commented on YARN-4024:
---------------------------------

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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | pre-patch |  19m 19s | Pre-patch trunk compilation is 
healthy. |
| {color:green}+1{color} | @author |   0m  0s | The patch does not contain any 
@author tags. |
| {color:green}+1{color} | tests included |   0m  0s | The patch appears to 
include 1 new or modified test files. |
| {color:green}+1{color} | javac |   8m  2s | There were no new javac warning 
messages. |
| {color:green}+1{color} | javadoc |   9m 53s | There were no new javadoc 
warning messages. |
| {color:green}+1{color} | release audit |   0m 23s | The applied patch does 
not increase the total number of release audit warnings. |
| {color:red}-1{color} | checkstyle |   1m 59s | The applied patch generated  1 
new checkstyle issues (total was 211, now 211). |
| {color:green}+1{color} | whitespace |   0m  2s | The patch has no lines that 
end in whitespace. |
| {color:green}+1{color} | install |   1m 28s | mvn install still works. |
| {color:green}+1{color} | eclipse:eclipse |   0m 32s | The patch built with 
eclipse:eclipse. |
| {color:red}-1{color} | findbugs |   4m 39s | The patch appears to introduce 1 
new Findbugs (version 3.0.0) warnings. |
| {color:green}+1{color} | yarn tests |   0m 24s | Tests passed in 
hadoop-yarn-api. |
| {color:green}+1{color} | yarn tests |   1m 58s | Tests passed in 
hadoop-yarn-common. |
| {color:red}-1{color} | yarn tests |  53m 32s | Tests failed in 
hadoop-yarn-server-resourcemanager. |
| | | 102m 55s | |
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|| Reason || Tests ||
| FindBugs | module:hadoop-yarn-server-resourcemanager |
| Failed unit tests | 
hadoop.yarn.server.resourcemanager.security.TestAMRMTokens |
|   | hadoop.yarn.server.resourcemanager.TestRMAdminService |
| Timed out tests | 
org.apache.hadoop.yarn.server.resourcemanager.webapp.TestNodesPage |
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|| Subsystem || Report/Notes ||
| Patch URL | 
http://issues.apache.org/jira/secure/attachment/12751636/YARN-4024-v6.patch |
| Optional Tests | javadoc javac unit findbugs checkstyle |
| git revision | trunk / 22de7c1 |
| checkstyle |  
https://builds.apache.org/job/PreCommit-YARN-Build/8893/artifact/patchprocess/diffcheckstylehadoop-yarn-api.txt
 |
| Findbugs warnings | 
https://builds.apache.org/job/PreCommit-YARN-Build/8893/artifact/patchprocess/newPatchFindbugsWarningshadoop-yarn-server-resourcemanager.html
 |
| hadoop-yarn-api test log | 
https://builds.apache.org/job/PreCommit-YARN-Build/8893/artifact/patchprocess/testrun_hadoop-yarn-api.txt
 |
| hadoop-yarn-common test log | 
https://builds.apache.org/job/PreCommit-YARN-Build/8893/artifact/patchprocess/testrun_hadoop-yarn-common.txt
 |
| hadoop-yarn-server-resourcemanager test log | 
https://builds.apache.org/job/PreCommit-YARN-Build/8893/artifact/patchprocess/testrun_hadoop-yarn-server-resourcemanager.txt
 |
| Test Results | 
https://builds.apache.org/job/PreCommit-YARN-Build/8893/testReport/ |
| Java | 1.7.0_55 |
| uname | Linux asf901.gq1.ygridcore.net 3.13.0-36-lowlatency #63-Ubuntu SMP 
PREEMPT Wed Sep 3 21:56:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux |
| Console output | 
https://builds.apache.org/job/PreCommit-YARN-Build/8893/console |


This message was automatically generated.

> 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
>         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
>
>
> 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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