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https://issues.apache.org/jira/browse/YARN-10702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17303777#comment-17303777
 ] 

Hadoop QA commented on YARN-10702:
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|| Vote || Subsystem || Runtime ||  Logfile || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue}  1m 
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| {color:green}+1{color} | {color:green} dupname {color} | {color:green}  0m  
0s{color} | {color:green}{color} | {color:green} No case conflicting files 
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| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  
0s{color} | {color:green}{color} | {color:green} The patch does not contain any 
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| {color:green}+1{color} | {color:green} {color} | {color:green}  0m  0s{color} 
| {color:green}test4tests{color} | {color:green} The patch appears to include 2 
new or modified test files. {color} |
|| || || || {color:brown} trunk Compile Tests {color} || ||
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 7s{color} | {color:green}{color} | {color:green} trunk passed {color} |
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41s{color} | {color:green}{color} | {color:green} trunk passed with JDK Private 
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| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  1m 
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54s{color} | {color:green}{color} | {color:green} trunk passed {color} |
| {color:green}+1{color} | {color:green} shadedclient {color} | {color:green} 
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| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
31s{color} | {color:green}{color} | {color:green} trunk passed with JDK 
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| {color:blue}0{color} | {color:blue} spotbugs {color} | {color:blue} 26m 
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| {color:green}+1{color} | {color:green} spotbugs {color} | {color:green}  4m  
0s{color} | {color:green}{color} | {color:green} trunk passed {color} |
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28s{color} | {color:green}{color} | {color:green} the patch passed {color} |
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12s{color} | {color:green}{color} | {color:green} the patch passed with JDK 
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| {color:green}+1{color} | {color:green} javac {color} | {color:green}  8m 
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| {color:orange}-0{color} | {color:orange} checkstyle {color} | {color:orange}  
1m 36s{color} | 
{color:orange}https://ci-hadoop.apache.org/job/PreCommit-YARN-Build/817/artifact/out/diff-checkstyle-hadoop-yarn-project_hadoop-yarn.txt{color}
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84 unchanged - 0 fixed = 90 total (was 84) {color} |
| {color:green}+1{color} | {color:green} mvnsite {color} | {color:green}  1m 
47s{color} | {color:green}{color} | {color:green} the patch passed {color} |
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| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  1m 
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| {color:green}+1{color} | {color:green} unit {color} | {color:green}  4m 
37s{color} | {color:green}{color} | {color:green} hadoop-yarn-common in the 
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| {color:green}+1{color} | {color:green} unit {color} | {color:green} 99m 
30s{color} | {color:green}{color} | {color:green} 
hadoop-yarn-server-resourcemanager in the patch passed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 
45s{color} | {color:green}{color} | {color:green} The patch does not generate 
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| {color:black}{color} | {color:black} {color} | {color:black}225m 52s{color} | 
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|| Subsystem || Report/Notes ||
| Docker | ClientAPI=1.41 ServerAPI=1.41 base: 
https://ci-hadoop.apache.org/job/PreCommit-YARN-Build/817/artifact/out/Dockerfile
 |
| JIRA Issue | YARN-10702 |
| JIRA Patch URL | 
https://issues.apache.org/jira/secure/attachment/13022535/YARN-10702.002.patch |
| Optional Tests | dupname asflicense compile javac javadoc mvninstall mvnsite 
unit shadedclient findbugs checkstyle spotbugs |
| uname | Linux 68d2edb9ae60 4.15.0-136-generic #140-Ubuntu SMP Thu Jan 28 
05:20:47 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality | personality/hadoop.sh |
| git revision | trunk / 49f89f1d3de |
| Default Java | Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 |
| Multi-JDK versions | 
/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 
/usr/lib/jvm/java-8-openjdk-amd64:Private 
Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08 |
|  Test Results | 
https://ci-hadoop.apache.org/job/PreCommit-YARN-Build/817/testReport/ |
| Max. process+thread count | 824 (vs. ulimit of 5500) |
| modules | C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
 U: hadoop-yarn-project/hadoop-yarn |
| Console output | 
https://ci-hadoop.apache.org/job/PreCommit-YARN-Build/817/console |
| versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
| Powered by | Apache Yetus 0.13.0-SNAPSHOT https://yetus.apache.org |


This message was automatically generated.



> Add cluster metric for amount of CPU used by RM Event Processor
> ---------------------------------------------------------------
>
>                 Key: YARN-10702
>                 URL: https://issues.apache.org/jira/browse/YARN-10702
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: yarn
>    Affects Versions: 2.10.1, 3.4.0
>            Reporter: Jim Brennan
>            Assignee: Jim Brennan
>            Priority: Minor
>         Attachments: Scheduler-Busy.png, YARN-10702.001.patch, 
> YARN-10702.002.patch, simon-scheduler-busy.png
>
>
> Add a cluster metric to track the cpu usage of the ResourceManager Event 
> Processing thread.   This lets us know when the critical path of the RM is 
> running out of headroom.
> This feature was originally added for us internally by [~nroberts] and we've 
> been running with it on production clusters for nearly four years.



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