YARN-7708. BackPort [GPG] Load based policy generator.

[slfan1989]

Description of PR

JIRA: YARN-7708. [BackPort] Load based policy generator.

Based on the backport code, I made some code improvements:

1. To enhance code readability.
2. Improve boundary condition checking.
3. add comments.

How was this patch tested?

Junit 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	0m 43s		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.
+0 🆗	xmllint	0m 0s		xmllint 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 _
+0 🆗	mvndep	14m 28s		Maven dependency ordering for branch
+1 💚	mvninstall	31m 18s		trunk passed
+1 💚	compile	7m 49s		trunk passed with JDK Ubuntu-11.0.19+7-post-Ubuntu-0ubuntu120.04.1
+1 💚	compile	7m 16s		trunk passed with JDK Private Build-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09
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+1 💚	javadoc	3m 32s		trunk passed with JDK Private Build-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09
+1 💚	spotbugs	11m 36s		trunk passed
+1 💚	shadedclient	33m 18s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 33s		Maven dependency ordering for patch
-1 ❌	mvninstall	2m 46s	/patch-mvninstall-hadoop-yarn-project_hadoop-yarn.txt	hadoop-yarn in the patch failed.
-1 ❌	mvninstall	0m 19s	/patch-mvninstall-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-globalpolicygenerator.txt	hadoop-yarn-server-globalpolicygenerator in the patch failed.
-1 ❌	compile	3m 4s	/patch-compile-hadoop-yarn-project_hadoop-yarn-jdkUbuntu-11.0.19+7-post-Ubuntu-0ubuntu120.04.1.txt	hadoop-yarn in the patch failed with JDK Ubuntu-11.0.19+7-post-Ubuntu-0ubuntu120.04.1.
-1 ❌	javac	3m 4s	/patch-compile-hadoop-yarn-project_hadoop-yarn-jdkUbuntu-11.0.19+7-post-Ubuntu-0ubuntu120.04.1.txt	hadoop-yarn in the patch failed with JDK Ubuntu-11.0.19+7-post-Ubuntu-0ubuntu120.04.1.
-1 ❌	compile	2m 53s	/patch-compile-hadoop-yarn-project_hadoop-yarn-jdkPrivateBuild-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09.txt	hadoop-yarn in the patch failed with JDK Private Build-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09.
-1 ❌	javac	2m 53s	/patch-compile-hadoop-yarn-project_hadoop-yarn-jdkPrivateBuild-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09.txt	hadoop-yarn in the patch failed with JDK Private Build-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09.
+1 💚	blanks	0m 0s		The patch has no blanks issues.
-0 ⚠️	checkstyle	1m 38s	/results-checkstyle-hadoop-yarn-project_hadoop-yarn.txt	hadoop-yarn-project/hadoop-yarn: The patch generated 6 new + 0 unchanged - 0 fixed = 6 total (was 0)
-1 ❌	mvnsite	2m 29s	/patch-mvnsite-hadoop-yarn-project_hadoop-yarn.txt	hadoop-yarn in the patch failed.
-1 ❌	mvnsite	0m 23s	/patch-mvnsite-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-globalpolicygenerator.txt	hadoop-yarn-server-globalpolicygenerator in the patch failed.
-1 ❌	javadoc	3m 4s	/patch-javadoc-hadoop-yarn-project_hadoop-yarn-jdkUbuntu-11.0.19+7-post-Ubuntu-0ubuntu120.04.1.txt	hadoop-yarn in the patch failed with JDK Ubuntu-11.0.19+7-post-Ubuntu-0ubuntu120.04.1.
-1 ❌	javadoc	0m 21s	/patch-javadoc-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-globalpolicygenerator-jdkUbuntu-11.0.19+7-post-Ubuntu-0ubuntu120.04.1.txt	hadoop-yarn-server-globalpolicygenerator in the patch failed with JDK Ubuntu-11.0.19+7-post-Ubuntu-0ubuntu120.04.1.
-1 ❌	javadoc	2m 38s	/patch-javadoc-hadoop-yarn-project_hadoop-yarn-jdkPrivateBuild-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09.txt	hadoop-yarn in the patch failed with JDK Private Build-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09.
-1 ❌	javadoc	0m 19s	/patch-javadoc-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-globalpolicygenerator-jdkPrivateBuild-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09.txt	hadoop-yarn-server-globalpolicygenerator in the patch failed with JDK Private Build-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09.
-1 ❌	spotbugs	8m 31s	/patch-spotbugs-hadoop-yarn-project_hadoop-yarn.txt	hadoop-yarn in the patch failed.
-1 ❌	spotbugs	0m 24s	/patch-spotbugs-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-globalpolicygenerator.txt	hadoop-yarn-server-globalpolicygenerator in the patch failed.
+1 💚	shadedclient	56m 35s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
-1 ❌	unit	238m 10s	/patch-unit-hadoop-yarn-project_hadoop-yarn.txt	hadoop-yarn in the patch failed.
-1 ❌	unit	0m 48s	/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-globalpolicygenerator.txt	hadoop-yarn-server-globalpolicygenerator in the patch failed.
+1 💚	asflicense	1m 17s		The patch does not generate ASF License warnings.
		429m 47s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5902/1/artifact/out/Dockerfile
GITHUB PR	#5902
Optional Tests	dupname asflicense codespell detsecrets xmllint compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle
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modules	C: hadoop-yarn-project/hadoop-yarn hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-globalpolicygenerator U: hadoop-yarn-project/hadoop-yarn
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5902/1/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	1m 1s		Docker mode activated.
			_ Prechecks _
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+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 _
+0 🆗	mvndep	13m 45s		Maven dependency ordering for branch
+1 💚	mvninstall	38m 29s		trunk passed
+1 💚	compile	8m 13s		trunk passed with JDK Ubuntu-11.0.19+7-post-Ubuntu-0ubuntu120.04.1
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+1 💚	spotbugs	15m 42s		trunk passed
+1 💚	shadedclient	38m 48s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 29s		Maven dependency ordering for patch
+1 💚	mvninstall	4m 32s		the patch passed
+1 💚	compile	7m 31s		the patch passed with JDK Ubuntu-11.0.19+7-post-Ubuntu-0ubuntu120.04.1
+1 💚	javac	7m 31s		the patch passed
+1 💚	compile	7m 23s		the patch passed with JDK Private Build-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09
+1 💚	javac	7m 23s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
-0 ⚠️	checkstyle	1m 54s	/results-checkstyle-hadoop-yarn-project_hadoop-yarn.txt	hadoop-yarn-project/hadoop-yarn: The patch generated 19 new + 164 unchanged - 0 fixed = 183 total (was 164)
+1 💚	mvnsite	5m 7s		the patch passed
+1 💚	javadoc	5m 11s		the patch passed with JDK Ubuntu-11.0.19+7-post-Ubuntu-0ubuntu120.04.1
+1 💚	javadoc	4m 30s		the patch passed with JDK Private Build-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09
+1 💚	spotbugs	16m 20s		the patch passed
+1 💚	shadedclient	37m 46s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	246m 9s		hadoop-yarn in the patch passed.
+1 💚	unit	1m 11s		hadoop-yarn-api in the patch passed.
+1 💚	unit	5m 39s		hadoop-yarn-common in the patch passed.
+1 💚	unit	0m 58s		hadoop-yarn-server-globalpolicygenerator in the patch passed.
+1 💚	asflicense	1m 1s		The patch does not generate ASF License warnings.
		492m 43s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5902/2/artifact/out/Dockerfile
GITHUB PR	#5902
Optional Tests	dupname asflicense codespell detsecrets xmllint compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle
uname	Linux 97888681cfc5 4.15.0-212-generic #223-Ubuntu SMP Tue May 23 13:09:22 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
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Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5902/2/testReport/
Max. process+thread count	1852 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-globalpolicygenerator U: hadoop-yarn-project/hadoop-yarn
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5902/2/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 58s		Docker mode activated.
			_ Prechecks _
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+1 💚	test4tests	0m 0s		The patch appears to include 1 new or modified test files.
			_ trunk Compile Tests _
+0 🆗	mvndep	14m 25s		Maven dependency ordering for branch
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			_ Patch Compile Tests _
+0 🆗	mvndep	0m 30s		Maven dependency ordering for patch
+1 💚	mvninstall	4m 29s		the patch passed
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+1 💚	javac	7m 31s		the patch passed
+1 💚	compile	7m 24s		the patch passed with JDK Private Build-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09
+1 💚	javac	7m 24s		the patch passed
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+1 💚	mvnsite	5m 5s		the patch passed
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+1 💚	spotbugs	16m 12s		the patch passed
+1 💚	shadedclient	38m 15s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	243m 40s		hadoop-yarn in the patch passed.
+1 💚	unit	1m 10s		hadoop-yarn-api in the patch passed.
+1 💚	unit	5m 40s		hadoop-yarn-common in the patch passed.
+1 💚	unit	0m 59s		hadoop-yarn-server-globalpolicygenerator in the patch passed.
+1 💚	asflicense	1m 2s		The patch does not generate ASF License warnings.
		488m 3s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5902/3/artifact/out/Dockerfile
GITHUB PR	#5902
Optional Tests	dupname asflicense codespell detsecrets xmllint compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle
uname	Linux 58f4ed5108e7 4.15.0-212-generic #223-Ubuntu SMP Tue May 23 13:09:22 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
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Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5902/3/testReport/
Max. process+thread count	1752 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-globalpolicygenerator U: hadoop-yarn-project/hadoop-yarn
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5902/3/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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[slfan1989]

@goiri Can you help review this pr? Thank you very much!

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	19m 20s		Docker mode activated.
			_ Prechecks _
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+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 _
+0 🆗	mvndep	13m 52s		Maven dependency ordering for branch
+1 💚	mvninstall	35m 42s		trunk passed
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			_ Patch Compile Tests _
+0 🆗	mvndep	0m 35s		Maven dependency ordering for patch
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+1 💚	shadedclient	38m 42s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	248m 0s		hadoop-yarn in the patch passed.
+1 💚	unit	1m 8s		hadoop-yarn-api in the patch passed.
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+1 💚	unit	0m 55s		hadoop-yarn-server-globalpolicygenerator in the patch passed.
+1 💚	asflicense	1m 8s		The patch does not generate ASF License warnings.
		524m 32s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5902/4/artifact/out/Dockerfile
GITHUB PR	#5902
Optional Tests	dupname asflicense codespell detsecrets xmllint compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle
uname	Linux 7e8715b4a203 4.15.0-212-generic #223-Ubuntu SMP Tue May 23 13:09:22 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / f08efb6
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Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5902/4/testReport/
Max. process+thread count	1900 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn hadoop-yarn-project/hadoop-yarn/hadoop-yarn-api hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-globalpolicygenerator U: hadoop-yarn-project/hadoop-yarn
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5902/4/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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[slfan1989]

@goiri Thank you very much for your help in reviewing the code! I will continue to follow up on BackPort YARN-8934. I will merge this pr into the trunk branch.