YARN-11197.Backport YARN-9608 - DecommissioningNodesWatcher should get lists of running applications on node from RMNode.

[ashutoshcipher]

Description of PR

Backport YARN-9608 - DecommissioningNodesWatcher should get lists of running applications on node from RMNode.\

JIRA: YARN-11197

How was this patch tested?

Added unit test

For code changes:

• 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]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	11m 15s		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.
			_ branch-2.10 Compile Tests _
+1 💚	mvninstall	16m 33s		branch-2.10 passed
+1 💚	compile	0m 58s		branch-2.10 passed with JDK Azul Systems, Inc.-1.7.0_262-b10
+1 💚	compile	0m 48s		branch-2.10 passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~18.04-b07
+1 💚	checkstyle	0m 40s		branch-2.10 passed
+1 💚	mvnsite	0m 58s		branch-2.10 passed
+1 💚	javadoc	0m 48s		branch-2.10 passed with JDK Azul Systems, Inc.-1.7.0_262-b10
+1 💚	javadoc	0m 36s		branch-2.10 passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~18.04-b07
+1 💚	spotbugs	2m 6s		branch-2.10 passed
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 44s		the patch passed
+1 💚	compile	0m 49s		the patch passed with JDK Azul Systems, Inc.-1.7.0_262-b10
+1 💚	javac	0m 49s		the patch passed
+1 💚	compile	0m 39s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~18.04-b07
+1 💚	javac	0m 39s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 27s		the patch passed
+1 💚	mvnsite	0m 45s		the patch passed
+1 💚	javadoc	0m 34s		the patch passed with JDK Azul Systems, Inc.-1.7.0_262-b10
+1 💚	javadoc	0m 27s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~18.04-b07
+1 💚	spotbugs	1m 41s		the patch passed
			_ Other Tests _
+1 💚	unit	67m 20s		hadoop-yarn-server-resourcemanager in the patch passed.
+1 💚	asflicense	0m 31s		The patch does not generate ASF License warnings.
		112m 37s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4500/1/artifact/out/Dockerfile
GITHUB PR	#4500
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux e60c0f69c241 4.15.0-175-generic #184-Ubuntu SMP Thu Mar 24 17:48:36 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	branch-2.10 / d9f7b05
Default Java	Private Build-1.8.0_312-8u312-b07-0ubuntu1~18.04-b07
Multi-JDK versions	/usr/lib/jvm/zulu-7-amd64:Azul Systems, Inc.-1.7.0_262-b10 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_312-8u312-b07-0ubuntu1~18.04-b07
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4500/1/testReport/
Max. process+thread count	837 (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-4500/1/console
versions	git=2.17.1 maven=3.6.0 spotbugs=4.2.2
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[PrabhuJoseph]

Thanks @ashutoshcipher for the backport. Looks good, +1. Will commit shortly.