YARN-11871. Make client retry when no active sub-cluster available.

[liubin101]

Description of PR

Under the YARN Federation architecture, when there's only one sub-cluster, or when multiple sub-clusters exist but a queue is configured to submit exclusively to a specific sub-cluster, the following problem occurs: If this target sub-cluster failover, its state will remain "non-active" until the new active RM completes registration and sends the first heartbeat (default 30 seconds later). During this window, any client attempting to submit applications will fail with the error: "No active SubCluster available to submit the request" or "No positive weight found on active subclusters".

In non-YARN Federation setups, clients automatically retry during RM failover. We expect this retry behavior to be preserved when transitioning to the YARN Federation architecture.

How was this patch tested?

unit test

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 21s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 1s		codespell was not available.
+0 🆗	detsecrets	0m 1s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	test4tests	0m 0s		The patch appears to include 12 new or modified test files.
			_ trunk Compile Tests _
+0 🆗	mvndep	8m 16s		Maven dependency ordering for branch
+1 💚	mvninstall	29m 26s		trunk passed
+1 💚	compile	3m 47s		trunk passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚	compile	3m 15s		trunk passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚	checkstyle	0m 56s		trunk passed
+1 💚	mvnsite	2m 13s		trunk passed
+1 💚	javadoc	1m 57s		trunk passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚	javadoc	1m 55s		trunk passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚	spotbugs	3m 59s		trunk passed
+1 💚	shadedclient	26m 51s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 22s		Maven dependency ordering for patch
+1 💚	mvninstall	1m 30s		the patch passed
+1 💚	compile	3m 10s		the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚	javac	3m 10s		the patch passed
+1 💚	compile	3m 3s		the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚	javac	3m 3s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
-0 ⚠️	checkstyle	0m 48s	/results-checkstyle-hadoop-yarn-project_hadoop-yarn.txt	hadoop-yarn-project/hadoop-yarn: The patch generated 9 new + 1 unchanged - 0 fixed = 10 total (was 1)
+1 💚	mvnsite	1m 50s		the patch passed
-1 ❌	javadoc	0m 25s	/results-javadoc-javadoc-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-common-jdkUbuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04.txt	hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-common-jdkUbuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 generated 8 new + 0 unchanged - 0 fixed = 8 total (was 0)
-1 ❌	javadoc	0m 26s	/results-javadoc-javadoc-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdkUbuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04.txt	hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdkUbuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 generated 1 new + 195 unchanged - 0 fixed = 196 total (was 195)
-1 ❌	javadoc	0m 27s	/results-javadoc-javadoc-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-common-jdkPrivateBuild-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09.txt	hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-common-jdkPrivateBuild-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09 with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09 generated 8 new + 0 unchanged - 0 fixed = 8 total (was 0)
-1 ❌	javadoc	0m 27s	/results-javadoc-javadoc-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdkPrivateBuild-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09.txt	hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdkPrivateBuild-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09 with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09 generated 1 new + 195 unchanged - 0 fixed = 196 total (was 195)
+1 💚	spotbugs	4m 28s		the patch passed
+1 💚	shadedclient	27m 11s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	4m 54s		hadoop-yarn-common in the patch passed.
-1 ❌	unit	3m 42s	/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-common.txt	hadoop-yarn-server-common in the patch passed.
+1 💚	unit	24m 25s		hadoop-yarn-server-nodemanager in the patch passed.
-1 ❌	unit	13m 11s	/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-router.txt	hadoop-yarn-server-router in the patch passed.
+1 💚	asflicense	0m 36s		The patch does not generate ASF License warnings.
		178m 9s

Reason	Tests
Failed junit tests	hadoop.yarn.server.federation.policies.router.TestRejectRouterPolicy
	hadoop.yarn.server.router.clientrm.TestFederationClientInterceptorRetry
	hadoop.yarn.server.router.subcluster.fair.TestYarnFederationWithFairScheduler

Subsystem	Report/Notes
Docker	ClientAPI=1.51 ServerAPI=1.51 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7997/1/artifact/out/Dockerfile
GITHUB PR	#7997
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux acb2dc988ce2 5.15.0-143-generic #153-Ubuntu SMP Fri Jun 13 19:10:45 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / a452103
Default Java	Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7997/1/testReport/
Max. process+thread count	1242 (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-common hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router U: hadoop-yarn-project/hadoop-yarn
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7997/1/console
versions	git=2.25.1 maven=3.9.11 spotbugs=4.2.2
Powered by	Apache Yetus 0.14.0 https://yetus.apache.org

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[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 21s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 1s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+0 🆗	detsecrets	0m 0s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	test4tests	0m 0s		The patch appears to include 12 new or modified test files.
			_ trunk Compile Tests _
+0 🆗	mvndep	7m 36s		Maven dependency ordering for branch
+1 💚	mvninstall	23m 45s		trunk passed
+1 💚	compile	3m 0s		trunk passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚	compile	2m 41s		trunk passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚	checkstyle	0m 52s		trunk passed
+1 💚	mvnsite	2m 27s		trunk passed
+1 💚	javadoc	2m 16s		trunk passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚	javadoc	2m 21s		trunk passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚	spotbugs	3m 53s		trunk passed
+1 💚	shadedclient	20m 49s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 25s		Maven dependency ordering for patch
+1 💚	mvninstall	1m 21s		the patch passed
+1 💚	compile	2m 44s		the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚	javac	2m 44s		the patch passed
+1 💚	compile	2m 46s		the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚	javac	2m 46s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
-0 ⚠️	checkstyle	0m 45s	/results-checkstyle-hadoop-yarn-project_hadoop-yarn.txt	hadoop-yarn-project/hadoop-yarn: The patch generated 1 new + 5 unchanged - 0 fixed = 6 total (was 5)
+1 💚	mvnsite	2m 9s		the patch passed
+1 💚	javadoc	0m 33s		hadoop-yarn-common in the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04.
+1 💚	javadoc	0m 29s		hadoop-yarn-server-common in the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04.
+1 💚	javadoc	0m 31s		hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdkUbuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 generated 0 new + 194 unchanged - 1 fixed = 194 total (was 195)
+1 💚	javadoc	0m 27s		hadoop-yarn-server-router in the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04.
+1 💚	javadoc	0m 35s		hadoop-yarn-common in the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09.
+1 💚	javadoc	0m 32s		hadoop-yarn-server-common in the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09.
+1 💚	javadoc	0m 33s		hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdkPrivateBuild-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09 with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09 generated 0 new + 194 unchanged - 1 fixed = 194 total (was 195)
+1 💚	javadoc	0m 26s		hadoop-yarn-server-router in the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09.
+1 💚	spotbugs	4m 17s		the patch passed
+1 💚	shadedclient	21m 12s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	4m 47s		hadoop-yarn-common in the patch passed.
+1 💚	unit	3m 35s		hadoop-yarn-server-common in the patch passed.
+1 💚	unit	24m 10s		hadoop-yarn-server-nodemanager in the patch passed.
-1 ❌	unit	13m 20s	/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-router.txt	hadoop-yarn-server-router in the patch passed.
+1 💚	asflicense	0m 40s		The patch does not generate ASF License warnings.
		159m 4s

Reason	Tests
Failed junit tests	hadoop.yarn.server.router.clientrm.TestFederationClientInterceptorRetry
	hadoop.yarn.server.router.webapp.TestFederationWebApp
	hadoop.yarn.server.router.subcluster.fair.TestYarnFederationWithFairScheduler

Subsystem	Report/Notes
Docker	ClientAPI=1.51 ServerAPI=1.51 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7997/2/artifact/out/Dockerfile
GITHUB PR	#7997
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 55185c56a955 5.15.0-143-generic #153-Ubuntu SMP Fri Jun 13 19:10:45 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / d82194d
Default Java	Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7997/2/testReport/
Max. process+thread count	1229 (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-common hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router U: hadoop-yarn-project/hadoop-yarn
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7997/2/console
versions	git=2.25.1 maven=3.9.11 spotbugs=4.2.2
Powered by	Apache Yetus 0.14.0 https://yetus.apache.org

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[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 22s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 1s		codespell was not available.
+0 🆗	detsecrets	0m 1s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	test4tests	0m 0s		The patch appears to include 12 new or modified test files.
			_ trunk Compile Tests _
+0 🆗	mvndep	7m 29s		Maven dependency ordering for branch
+1 💚	mvninstall	30m 20s		trunk passed
+1 💚	compile	3m 11s		trunk passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚	compile	2m 49s		trunk passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚	checkstyle	0m 47s		trunk passed
+1 💚	mvnsite	1m 53s		trunk passed
+1 💚	javadoc	1m 48s		trunk passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚	javadoc	1m 42s		trunk passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚	spotbugs	3m 23s		trunk passed
+1 💚	shadedclient	26m 31s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 21s		Maven dependency ordering for patch
+1 💚	mvninstall	1m 7s		the patch passed
+1 💚	compile	2m 56s		the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚	javac	2m 56s		the patch passed
+1 💚	compile	2m 46s		the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚	javac	2m 46s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 41s		the patch passed
+1 💚	mvnsite	1m 39s		the patch passed
+1 💚	javadoc	0m 26s		hadoop-yarn-common in the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04.
+1 💚	javadoc	0m 22s		hadoop-yarn-server-common in the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04.
+1 💚	javadoc	0m 24s		hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdkUbuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 generated 0 new + 194 unchanged - 1 fixed = 194 total (was 195)
+1 💚	javadoc	0m 21s		hadoop-yarn-server-router in the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04.
+1 💚	javadoc	0m 27s		hadoop-yarn-common in the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09.
+1 💚	javadoc	0m 22s		hadoop-yarn-server-common in the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09.
+1 💚	javadoc	0m 26s		hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdkPrivateBuild-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09 with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09 generated 0 new + 194 unchanged - 1 fixed = 194 total (was 195)
+1 💚	javadoc	0m 21s		hadoop-yarn-server-router in the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09.
+1 💚	spotbugs	3m 28s		the patch passed
+1 💚	shadedclient	26m 11s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	4m 6s		hadoop-yarn-common in the patch passed.
+1 💚	unit	3m 5s		hadoop-yarn-server-common in the patch passed.
+1 💚	unit	23m 4s		hadoop-yarn-server-nodemanager in the patch passed.
-1 ❌	unit	12m 52s	/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-router.txt	hadoop-yarn-server-router in the patch passed.
+1 💚	asflicense	0m 36s		The patch does not generate ASF License warnings.
		168m 49s

Reason	Tests
Failed junit tests	hadoop.yarn.server.router.clientrm.TestFederationClientInterceptorRetry
	hadoop.yarn.server.router.subcluster.fair.TestYarnFederationWithFairScheduler

Subsystem	Report/Notes
Docker	ClientAPI=1.51 ServerAPI=1.51 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7997/3/artifact/out/Dockerfile
GITHUB PR	#7997
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 579cc7fb0d3b 5.15.0-156-generic #166-Ubuntu SMP Sat Aug 9 00:02:46 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 5c474dd
Default Java	Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7997/3/testReport/
Max. process+thread count	1249 (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-common hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router U: hadoop-yarn-project/hadoop-yarn
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7997/3/console
versions	git=2.25.1 maven=3.9.11 spotbugs=4.2.2
Powered by	Apache Yetus 0.14.0 https://yetus.apache.org

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[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 22s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 1s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+0 🆗	detsecrets	0m 0s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	test4tests	0m 0s		The patch appears to include 12 new or modified test files.
			_ trunk Compile Tests _
+0 🆗	mvndep	10m 2s		Maven dependency ordering for branch
+1 💚	mvninstall	24m 37s		trunk passed
+1 💚	compile	2m 59s		trunk passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚	compile	2m 43s		trunk passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
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+1 💚	javadoc	1m 57s		trunk passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚	spotbugs	3m 21s		trunk passed
+1 💚	shadedclient	21m 28s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 22s		Maven dependency ordering for patch
+1 💚	mvninstall	1m 14s		the patch passed
+1 💚	compile	2m 39s		the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚	javac	2m 39s		the patch passed
+1 💚	compile	2m 36s		the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚	javac	2m 36s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 41s		the patch passed
+1 💚	mvnsite	1m 52s		the patch passed
+1 💚	javadoc	0m 27s		hadoop-yarn-common in the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04.
+1 💚	javadoc	0m 24s		hadoop-yarn-server-common in the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04.
+1 💚	javadoc	0m 24s		hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdkUbuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 generated 0 new + 194 unchanged - 1 fixed = 194 total (was 195)
+1 💚	javadoc	0m 20s		hadoop-yarn-server-router in the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04.
+1 💚	javadoc	0m 30s		hadoop-yarn-common in the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09.
+1 💚	javadoc	0m 23s		hadoop-yarn-server-common in the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09.
+1 💚	javadoc	0m 24s		hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-nodemanager-jdkPrivateBuild-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09 with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09 generated 0 new + 194 unchanged - 1 fixed = 194 total (was 195)
+1 💚	javadoc	0m 21s		hadoop-yarn-server-router in the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09.
+1 💚	spotbugs	3m 46s		the patch passed
+1 💚	shadedclient	22m 6s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	4m 32s		hadoop-yarn-common in the patch passed.
+1 💚	unit	3m 15s		hadoop-yarn-server-common in the patch passed.
+1 💚	unit	23m 41s		hadoop-yarn-server-nodemanager in the patch passed.
-1 ❌	unit	13m 6s	/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-router.txt	hadoop-yarn-server-router in the patch passed.
+1 💚	asflicense	0m 33s		The patch does not generate ASF License warnings.
		158m 25s

Reason	Tests
Failed junit tests	hadoop.yarn.server.router.subcluster.fair.TestYarnFederationWithFairScheduler

Subsystem	Report/Notes
Docker	ClientAPI=1.51 ServerAPI=1.51 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7997/4/artifact/out/Dockerfile
GITHUB PR	#7997
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 1c3f549c4c84 5.15.0-156-generic #166-Ubuntu SMP Sat Aug 9 00:02:46 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / f1bd005
Default Java	Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7997/4/testReport/
Max. process+thread count	1249 (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-common hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router U: hadoop-yarn-project/hadoop-yarn
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7997/4/console
versions	git=2.25.1 maven=3.9.11 spotbugs=4.2.2
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[github-actions]

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.