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https://issues.apache.org/jira/browse/YARN-11588?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17773494#comment-17773494
 ] 

ASF GitHub Bot commented on YARN-11588:
---------------------------------------

hadoop-yetus commented on PR #6159:
URL: https://github.com/apache/hadoop/pull/6159#issuecomment-1754051300

   :confetti_ball: **+1 overall**
   
   
   
   
   
   
   | Vote | Subsystem | Runtime |  Logfile | Comment |
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   |||| _ trunk Compile Tests _ |
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   |||| _ Other Tests _ |
   | +1 :green_heart: |  unit  |   0m 31s |  |  hadoop-yarn-server-router in 
the patch passed.  |
   | +1 :green_heart: |  asflicense  |   0m 39s |  |  The patch does not 
generate ASF License warnings.  |
   |  |   | 123m 17s |  |  |
   
   
   | Subsystem | Report/Notes |
   |----------:|:-------------|
   | Docker | ClientAPI=1.43 ServerAPI=1.43 base: 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6159/2/artifact/out/Dockerfile
 |
   | GITHUB PR | https://github.com/apache/hadoop/pull/6159 |
   | Optional Tests | dupname asflicense compile javac javadoc mvninstall 
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   | uname | Linux d0dbdacc3035 4.15.0-213-generic #224-Ubuntu SMP Mon Jun 19 
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   |  Test Results | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6159/2/testReport/ |
   | Max. process+thread count | 555 (vs. ulimit of 5500) |
   | modules | C: 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router U: 
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router |
   | Console output | 
https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-6159/2/console |
   | versions | git=2.25.1 maven=3.6.3 spotbugs=4.2.2 |
   | Powered by | Apache Yetus 0.14.0 https://yetus.apache.org |
   
   
   This message was automatically generated.
   
   




> Fix uncleaned threads in YARN Federation interceptor threadpool
> ---------------------------------------------------------------
>
>                 Key: YARN-11588
>                 URL: https://issues.apache.org/jira/browse/YARN-11588
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Jeffrey Chang
>            Priority: Major
>              Labels: pull-request-available
>
> In YARN Federation a new interceptor is generated for each new user that 
> calls YARN Router. This also generates a threadpool which is used to call 
> YARN RM. However, when the call is finished the threadpool threads never 
> exits, causing the interceptor object for the user to never be cleaned up. 
> This causes an issue when the number of users is large in the YARN cluster, 
> as the number of idle, uncleaned thread can reach # of users calling router 
> times number of active core threads in thread pool. This causes performance 
> issues in router due to too many idle threads. 



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