YARN-11736. Enhance MultiNodeLookupPolicy to allow configuration of extended comparators for better usability.

[TaoYang526]

Description of PR

Please refer to JIRA: YARN-11736

How was this patch tested?

UT

For code changes:

• [x] Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
• [ ] Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
• [ ] If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
• [ ] If applicable, have you updated the LICENSE, LICENSE-binary, NOTICE-binary files?

[hadoop-yetus]

:broken_heart: -1 overall

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GITHUB PR	https://github.com/apache/hadoop/pull/7121
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[TaoYang526]

@yangwwei @sunilgovind @shameersss1 Could you please help to review this PR? Thanks!

[hadoop-yetus]

:broken_heart: -1 overall

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GITHUB PR	https://github.com/apache/hadoop/pull/7121
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[TaoYang526]

Hi, @yangjiandan It seems that you were using and contributing for multi-node mechanism recently, could you please help to review this PR? Thanks.

[shameersss1]

Sure, will review this week.

[TaoYang526]

Please add the modification about the configs and new class here : https://hadoop.apache.org/docs/stable/hadoop-yarn/hadoop-yarn-site/CapacityScheduler.html (you can find the changes to be done for this page in the hadoop code base itself) so that the end users know about its existence.

@shameersss1 There is no introduce about multi-node policy in the document yet, therefore I am unable to update or add any further information. I would like to add document for multi-node mechanism, but it's not suitable in this PR, we may need to create another JIRA ticket for the documentation. Does that sound good?

[slfan1989]

@TaoYang526 @shameersss1 I am eager to help, even though I’m not very familiar with this part of YARN. I will do my best. If we can confirm together that the modified code is fine, we can proceed with merging it. I've reviewed @shameersss1 code, and the quality is quite good.

[TaoYang526]

@slfan1989 Thank you for joining us, it's great to have you help out.

[TaoYang526]

@shameersss1 Thanks for the review. I have added javadoc for key fields in the last commit. Please take another look and let me know if there’s anything else that needs attention.

[hadoop-yetus]

:broken_heart: -1 overall

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			_ Other Tests _
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		122m 30s

Reason	Tests
SpotBugs	module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
	org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement.policy.CompositeComparator implements Comparator but not Serializable At MultiComparatorPolicy.java:Serializable At MultiComparatorPolicy.java:[lines 334-359]

Subsystem	Report/Notes
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[hadoop-yetus]

:broken_heart: -1 overall

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		244m 25s

Reason	Tests
SpotBugs	module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
	org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement.policy.CompositeComparator implements Comparator but not Serializable At MultiComparatorPolicy.java:Serializable At MultiComparatorPolicy.java:[lines 333-358]

Subsystem	Report/Notes
Docker	ClientAPI=1.47 ServerAPI=1.47 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7121/4/artifact/out/Dockerfile
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[TaoYang526]

@slfan1989 Could you please help to review this PR? Thanks.

[zuston]

Oh, I will we encoutered the similar problems about multi node placement about different resource spec. And I found some bugs about this features, please refer to: https://zuston.vercel.app/publish/hadoop-yarn/

[zuston]

BTW, I think the node sorting policy could be extended by ourself, there is no necessary to change the default policy.

[TaoYang526]

@zuston Thanks for the feedback.

Oh, I will we encoutered the similar problems about multi node placement about different resource spec. And I found some bugs about this features, please refer to: https://zuston.vercel.app/publish/hadoop-yarn/

You are right, I have proposed to fix those bugs in YARN-9598, but it was in dispute after some discussions, and part of it were merged into community in YARN-11573 which you mentioned in your article. FYI, when the scheduler found another node can place the pending request, reserved container for this request can be unreserved before assigning, you can see the details in RegularContainerAllocator#assignContainer.

BTW, I think the node sorting policy could be extended by ourself, there is no necessary to change the default policy.

This PR doesn't change the default policy, just add a new policy can be configured to use.

[zuston]

FYI, when the scheduler found another node can place the pending request, reserved container for this request can be unreserved before assigning

Thanks for pointing out this, let me take a deep look.

Oh, I found the assoicated code. But it may still exist some bugs that my article described.

[shameersss1]

@TaoYang526 - Isn't this - https://issues.apache.org/jira/browse/YARN-11728 Same problem as well ?

[zuston]

@TaoYang526 - Isn't this - https://issues.apache.org/jira/browse/YARN-11728 Same problem as well ?

Yes, this issue is created by me.

[zuston]

@zuston Thanks for the feedback.

Oh, I will we encoutered the similar problems about multi node placement about different resource spec. And I found some bugs about this features, please refer to: https://zuston.vercel.app/publish/hadoop-yarn/

You are right, I have proposed to fix those bugs in YARN-9598, but it was in dispute after some discussions, and part of it were merged into community in YARN-11573 which you mentioned in your article. FYI, when the scheduler found another node can place the pending request, reserved container for this request can be unreserved before assigning, you can see the details in RegularContainerAllocator#assignContainer.

BTW, I think the node sorting policy could be extended by ourself, there is no necessary to change the default policy.

This PR doesn't change the default policy, just add a new policy can be configured to use.

After reading the RegularContainerAllocator#assignContainer, I think some bugs still exist like described in my article or YARN-11728.

In the below refered code, it just will pickup reserved container from another node, but obviously it don't unreserve this in the commit phase, that's the root cause of this bug.

From my sight, this bug also exist in the case of multi node placement disable, which is just covered up by the normal node round-robin strategy.

FYI, it looks the mechansim of reserved container picked up by another node is not implemented will.

https://github.com/apache/hadoop/blob/964e0897d4ad828834bbb81c9f82ba92834d994c/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/capacity/allocator/RegularContainerAllocator.java#L581-L621

[TaoYang526]

@zuston This FYI is just a kind reminder because I thought you are trying to find out the logic about how to allocate on another node for reserved container, according to your article. The bug is still there, and I also mentioned that YARN-9598 tried to fix it but only part of it is merged. It's great if you can help to solve that bug. Could you please take the further discussion in YARN-11728? I'd like to keep this PR focusing on the improvement of the sorting policy. Thanks so much for your understanding!

[shameersss1]

@TaoYang526 Please take care of checkstyle and javadoc issues. Is UT failures related?

[TaoYang526]

Thanks @shameersss1 for the reminder. The UT failures seems irrelevant (Fatal error compiling: error: release version 1.8 not supported). I will merge some optimized code on the performance improvement for large scale cluster and address some check-style issues later.

[TaoYang526]

I have just committed optimized code to help this policy achieving high scheduling quality and meanwhile ensuring high performance with cache enabled. There are 2 important improvements:

• Introduce PreferredIterator with next-fit policy to avoid always choosing the first node when cache enabled.
• Separate sorted nodes to 3 zones: preferred, normal and ignored to achieve high scheduling quality, front nodes in preferred zone will have more opportunities to be chosen then nodes in normal zone, and rear nodes in ignored zone can be ignored in the scheduling process for now to avoid make things worse.

[hadoop-yetus]

:broken_heart: -1 overall

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-1 :x:	javadoc	0m 23s	/patch-javadoc-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager-jdkUbuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04.txt	hadoop-yarn-server-resourcemanager in the patch failed with JDK Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04.
-1 :x:	javadoc	0m 22s	/patch-javadoc-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager-jdkPrivateBuild-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga.txt	hadoop-yarn-server-resourcemanager in the patch failed with JDK Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga.
-1 :x:	spotbugs	0m 22s	/patch-spotbugs-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt	hadoop-yarn-server-resourcemanager in the patch failed.
-1 :x:	shadedclient	11m 34s		patch has errors when building and testing our client artifacts.
			_ Other Tests _
-1 :x:	unit	0m 24s	/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt	hadoop-yarn-server-resourcemanager in the patch failed.
-1 :x:	asflicense	0m 35s	/results-asflicense.txt	The patch generated 1 ASF License warnings.
		90m 57s

Subsystem	Report/Notes
Docker	ClientAPI=1.47 ServerAPI=1.47 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7121/5/artifact/out/Dockerfile
GITHUB PR	https://github.com/apache/hadoop/pull/7121
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 066885d9e077 5.15.0-124-generic #134-Ubuntu SMP Fri Sep 27 20:20:17 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 8fec29258d8bb1847d9306ebbf91dda0e023b32d
Default Java	Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7121/5/testReport/
Max. process+thread count	554 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager U: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7121/5/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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[hadoop-yetus]

:broken_heart: -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 :ok:	reexec	0m 34s		Docker mode activated.
			_ Prechecks _
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			_ trunk Compile Tests _
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+1 :green_heart:	shadedclient	33m 44s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
-1 :x:	mvninstall	0m 41s	/patch-mvninstall-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt	hadoop-yarn-server-resourcemanager in the patch failed.
-1 :x:	compile	0m 50s	/patch-compile-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager-jdkUbuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04.txt	hadoop-yarn-server-resourcemanager in the patch failed with JDK Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04.
-1 :x:	javac	0m 50s	/patch-compile-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager-jdkUbuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04.txt	hadoop-yarn-server-resourcemanager in the patch failed with JDK Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04.
-1 :x:	compile	0m 42s	/patch-compile-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager-jdkPrivateBuild-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga.txt	hadoop-yarn-server-resourcemanager in the patch failed with JDK Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga.
-1 :x:	javac	0m 42s	/patch-compile-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager-jdkPrivateBuild-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga.txt	hadoop-yarn-server-resourcemanager in the patch failed with JDK Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga.
+1 :green_heart:	blanks	0m 0s		The patch has no blanks issues.
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-1 :x:	javadoc	0m 44s	/patch-javadoc-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager-jdkUbuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04.txt	hadoop-yarn-server-resourcemanager in the patch failed with JDK Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04.
-1 :x:	javadoc	0m 41s	/patch-javadoc-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager-jdkPrivateBuild-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga.txt	hadoop-yarn-server-resourcemanager in the patch failed with JDK Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga.
-1 :x:	spotbugs	0m 43s	/patch-spotbugs-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt	hadoop-yarn-server-resourcemanager in the patch failed.
-1 :x:	shadedclient	13m 21s		patch has errors when building and testing our client artifacts.
			_ Other Tests _
-1 :x:	unit	0m 46s	/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt	hadoop-yarn-server-resourcemanager in the patch failed.
+1 :green_heart:	asflicense	0m 35s		The patch does not generate ASF License warnings.
		93m 28s

Subsystem	Report/Notes
Docker	ClientAPI=1.47 ServerAPI=1.47 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7121/6/artifact/out/Dockerfile
GITHUB PR	https://github.com/apache/hadoop/pull/7121
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 0719a4554168 5.15.0-124-generic #134-Ubuntu SMP Fri Sep 27 20:20:17 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
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Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7121/6/testReport/
Max. process+thread count	556 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager U: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7121/6/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

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[hadoop-yetus]

:broken_heart: -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 :ok:	reexec	0m 35s		Docker mode activated.
			_ Prechecks _
+1 :green_heart:	dupname	0m 0s		No case conflicting files found.
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			_ trunk Compile Tests _
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+1 :green_heart:	shadedclient	33m 31s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 :green_heart:	mvninstall	0m 44s		the patch passed
+1 :green_heart:	compile	0m 50s		the patch passed with JDK Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04
+1 :green_heart:	javac	0m 50s		the patch passed
+1 :green_heart:	compile	0m 45s		the patch passed with JDK Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga
+1 :green_heart:	javac	0m 45s		the patch passed
+1 :green_heart:	blanks	0m 0s		The patch has no blanks issues.
+1 :green_heart:	checkstyle	0m 43s		the patch passed
+1 :green_heart:	mvnsite	0m 47s		the patch passed
-1 :x:	javadoc	0m 43s	/patch-javadoc-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager-jdkUbuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04.txt	hadoop-yarn-server-resourcemanager in the patch failed with JDK Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04.
-1 :x:	javadoc	0m 40s	/patch-javadoc-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager-jdkPrivateBuild-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga.txt	hadoop-yarn-server-resourcemanager in the patch failed with JDK Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga.
-1 :x:	spotbugs	1m 53s	/new-spotbugs-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.html	hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager generated 1 new + 0 unchanged - 0 fixed = 1 total (was 0)
+1 :green_heart:	shadedclient	33m 32s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 :green_heart:	unit	104m 0s		hadoop-yarn-server-resourcemanager in the patch passed.
+1 :green_heart:	asflicense	0m 37s		The patch does not generate ASF License warnings.
		221m 0s

Reason	Tests
SpotBugs	module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
	org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement.policy.CompositeComparator implements Comparator but not Serializable At MultiComparatorPolicy.java:Serializable At MultiComparatorPolicy.java:[lines 419-444]

Subsystem	Report/Notes
Docker	ClientAPI=1.47 ServerAPI=1.47 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7121/7/artifact/out/Dockerfile
GITHUB PR	https://github.com/apache/hadoop/pull/7121
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 480c8778b84a 5.15.0-124-generic #134-Ubuntu SMP Fri Sep 27 20:20:17 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 3b75308a879fc9396d2c44d35783163def366e16
Default Java	Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7121/7/testReport/
Max. process+thread count	964 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager U: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7121/7/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

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[hadoop-yetus]

:broken_heart: -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 :ok:	reexec	0m 33s		Docker mode activated.
			_ Prechecks _
+1 :green_heart:	dupname	0m 0s		No case conflicting files found.
+0 :ok:	codespell	0m 1s		codespell was not available.
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+1 :green_heart:	@author	0m 0s		The patch does not contain any @author tags.
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			_ trunk Compile Tests _
+1 :green_heart:	mvninstall	34m 12s		trunk passed
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+1 :green_heart:	mvnsite	0m 57s		trunk passed
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+1 :green_heart:	shadedclient	36m 57s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 :green_heart:	mvninstall	0m 47s		the patch passed
+1 :green_heart:	compile	0m 51s		the patch passed with JDK Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04
+1 :green_heart:	javac	0m 51s		the patch passed
+1 :green_heart:	compile	0m 46s		the patch passed with JDK Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga
+1 :green_heart:	javac	0m 46s		the patch passed
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+1 :green_heart:	checkstyle	0m 45s		the patch passed
+1 :green_heart:	mvnsite	0m 46s		the patch passed
+1 :green_heart:	javadoc	0m 44s		the patch passed with JDK Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04
+1 :green_heart:	javadoc	0m 39s		the patch passed with JDK Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga
-1 :x:	spotbugs	1m 56s	/new-spotbugs-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.html	hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager generated 2 new + 0 unchanged - 0 fixed = 2 total (was 0)
+1 :green_heart:	shadedclient	33m 43s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 :green_heart:	unit	103m 31s		hadoop-yarn-server-resourcemanager in the patch passed.
+1 :green_heart:	asflicense	0m 38s		The patch does not generate ASF License warnings.
		223m 47s

Reason	Tests
SpotBugs	module:hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
	org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement.policy.Comparator is Serializable; consider declaring a serialVersionUID At MultiComparatorPolicy.java:a serialVersionUID At MultiComparatorPolicy.java:[lines 336-355]
	The field org.apache.hadoop.yarn.server.resourcemanager.scheduler.placement.policy.Comparator.calculator is transient but isn't set by deserialization In MultiComparatorPolicy.java:but isn't set by deserialization In MultiComparatorPolicy.java

Subsystem	Report/Notes
Docker	ClientAPI=1.47 ServerAPI=1.47 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7121/8/artifact/out/Dockerfile
GITHUB PR	https://github.com/apache/hadoop/pull/7121
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 41ebfc405d42 5.15.0-124-generic #134-Ubuntu SMP Fri Sep 27 20:20:17 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / f774f3eecdc799d29925a0bc99e052b8a3d66372
Default Java	Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7121/8/testReport/
Max. process+thread count	1017 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager U: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7121/8/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

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[hadoop-yetus]

:confetti_ball: +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 :ok:	reexec	11m 58s		Docker mode activated.
			_ Prechecks _
+1 :green_heart:	dupname	0m 1s		No case conflicting files found.
+0 :ok:	codespell	0m 0s		codespell was not available.
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+1 :green_heart:	@author	0m 0s		The patch does not contain any @author tags.
+1 :green_heart:	test4tests	0m 0s		The patch appears to include 4 new or modified test files.
			_ trunk Compile Tests _
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+1 :green_heart:	shadedclient	34m 5s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 :green_heart:	mvninstall	0m 53s		the patch passed
+1 :green_heart:	compile	0m 51s		the patch passed with JDK Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04
+1 :green_heart:	javac	0m 51s		the patch passed
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+1 :green_heart:	mvnsite	0m 45s		the patch passed
+1 :green_heart:	javadoc	0m 44s		the patch passed with JDK Ubuntu-11.0.25+9-post-Ubuntu-1ubuntu120.04
+1 :green_heart:	javadoc	0m 40s		the patch passed with JDK Private Build-1.8.0_432-8u432-ga~us1-0ubuntu2~20.04-ga
+1 :green_heart:	spotbugs	1m 51s		the patch passed
+1 :green_heart:	shadedclient	33m 27s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 :green_heart:	unit	104m 15s		hadoop-yarn-server-resourcemanager in the patch passed.
+1 :green_heart:	asflicense	0m 35s		The patch does not generate ASF License warnings.
		233m 45s

Subsystem	Report/Notes
Docker	ClientAPI=1.47 ServerAPI=1.47 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7121/9/artifact/out/Dockerfile
GITHUB PR	https://github.com/apache/hadoop/pull/7121
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
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Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7121/9/testReport/
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Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7121/9/console
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[github-actions[bot]]

We're closing this stale PR because it has been open for 100 days with no activity. This isn't a judgement on the merit of the PR in any way. It's just a way of keeping the PR queue manageable. If you feel like this was a mistake, or you would like to continue working on it, please feel free to re-open it and ask for a committer to remove the stale tag and review again. Thanks all for your contribution.