YARN-12021. Clamp CapacityScheduler resource bar width in the web UI

[luoyuan3471]

Description of PR

YARN-12021 fixes CapacityScheduler queue and partition resource bars overflowing their containers when used capacity exceeds 100%.

The web UI previously converted the raw used-capacity ratio directly into CSS width, which could produce values such as width:487.5%. This patch clamps only the visual bar width to the range from 0% to 100% in all four affected rendering paths. The actual utilization percentage and the existing over-capacity color remain based on the original value, so scheduler and metric semantics are unchanged.

A focused unit test covers negative, normal, and over-capacity values.

How was this patch tested?

mvn -pl hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager -Dtest=TestCapacitySchedulerPage -DskipShade test

Result: 1 test run, 0 failures, 0 errors, 0 skipped.

git diff --check

For code changes:

• Does the title of this PR start with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
• Object storage: Not applicable; this patch does not change an object storage connector.
• No new dependencies are added by this patch.
• No updates to LICENSE, LICENSE-binary, or NOTICE-binary are required.

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[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 37s		Docker mode activated.
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+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 1 new or modified test files.
			_ trunk Compile Tests _
+1 💚	mvninstall	49m 44s		trunk passed
+1 💚	compile	1m 26s		trunk passed with JDK Ubuntu-21.0.12.1+1-1-24.04.4-Ubuntu
+1 💚	compile	1m 31s		trunk passed with JDK Ubuntu-17.0.20.1+1-1-24.04-Ubuntu
+1 💚	checkstyle	1m 22s		trunk passed
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+1 💚	javadoc	1m 12s		trunk passed with JDK Ubuntu-17.0.20.1+1-1-24.04-Ubuntu
+1 💚	spotbugs	2m 39s		trunk passed
+1 💚	shadedclient	33m 31s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	1m 4s		the patch passed
+1 💚	compile	1m 1s		the patch passed with JDK Ubuntu-21.0.12.1+1-1-24.04.4-Ubuntu
+1 💚	javac	1m 1s		the patch passed
+1 💚	compile	1m 1s		the patch passed with JDK Ubuntu-17.0.20.1+1-1-24.04-Ubuntu
+1 💚	javac	1m 1s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 56s		the patch passed
+1 💚	mvnsite	1m 5s		the patch passed
+1 💚	javadoc	0m 49s		the patch passed with JDK Ubuntu-21.0.12.1+1-1-24.04.4-Ubuntu
+1 💚	javadoc	0m 54s		the patch passed with JDK Ubuntu-17.0.20.1+1-1-24.04-Ubuntu
+1 💚	spotbugs	2m 29s		the patch passed
+1 💚	shadedclient	33m 42s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	110m 7s		hadoop-yarn-server-resourcemanager in the patch passed.
+1 💚	asflicense	0m 38s		The patch does not generate ASF License warnings.
		248m 35s

Subsystem	Report/Notes
Docker	ClientAPI=1.56 ServerAPI=1.56 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8813/1/artifact/out/Dockerfile
GITHUB PR	#8813
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux bc1bdc44de2c 5.15.0-186-generic #196-Ubuntu SMP Sat Jun 20 16:09:34 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux
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Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8813/1/testReport/
Max. process+thread count	934 (vs. ulimit of 10000)
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-8813/1/console
versions	git=2.43.0 maven=3.9.15 spotbugs=4.9.7
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[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 36s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		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 1 new or modified test files.
			_ trunk Compile Tests _
+1 💚	mvninstall	43m 39s		trunk passed
+1 💚	compile	1m 29s		trunk passed with JDK Ubuntu-21.0.12.1+1-1-24.04.4-Ubuntu
+1 💚	compile	1m 32s		trunk passed with JDK Ubuntu-17.0.20.1+1-1-24.04-Ubuntu
+1 💚	checkstyle	1m 28s		trunk passed
+1 💚	mvnsite	1m 36s		trunk passed
+1 💚	javadoc	1m 22s		trunk passed with JDK Ubuntu-21.0.12.1+1-1-24.04.4-Ubuntu
+1 💚	javadoc	1m 20s		trunk passed with JDK Ubuntu-17.0.20.1+1-1-24.04-Ubuntu
+1 💚	spotbugs	2m 41s		trunk passed
+1 💚	shadedclient	30m 38s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 59s		the patch passed
+1 💚	compile	0m 55s		the patch passed with JDK Ubuntu-21.0.12.1+1-1-24.04.4-Ubuntu
+1 💚	javac	0m 55s		the patch passed
+1 💚	compile	1m 1s		the patch passed with JDK Ubuntu-17.0.20.1+1-1-24.04-Ubuntu
+1 💚	javac	1m 1s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 52s		the patch passed
+1 💚	mvnsite	1m 2s		the patch passed
+1 💚	javadoc	0m 47s		the patch passed with JDK Ubuntu-21.0.12.1+1-1-24.04.4-Ubuntu
+1 💚	javadoc	0m 47s		the patch passed with JDK Ubuntu-17.0.20.1+1-1-24.04-Ubuntu
+1 💚	spotbugs	2m 18s		the patch passed
+1 💚	shadedclient	29m 36s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	111m 7s		hadoop-yarn-server-resourcemanager in the patch passed.
+1 💚	asflicense	0m 38s		The patch does not generate ASF License warnings.
		236m 22s

Subsystem	Report/Notes
Docker	ClientAPI=1.56 ServerAPI=1.56 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8813/2/artifact/out/Dockerfile
GITHUB PR	#8813
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 33f25aa3ed89 5.15.0-186-generic #196-Ubuntu SMP Sat Jun 20 16:09:34 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 147bd66
Default Java	Ubuntu-17.0.20.1+1-1-24.04-Ubuntu
Multi-JDK versions	/usr/lib/jvm/java-21-openjdk-amd64:Ubuntu-21.0.12.1+1-1-24.04.4-Ubuntu /usr/lib/jvm/java-17-openjdk-amd64:Ubuntu-17.0.20.1+1-1-24.04-Ubuntu
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8813/2/testReport/
Max. process+thread count	972 (vs. ulimit of 10000)
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-8813/2/console
versions	git=2.43.0 maven=3.9.15 spotbugs=4.9.7
Powered by	Apache Yetus 0.14.1 https://yetus.apache.org

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