YARN-11007.Improve doc

[GuoPhilipse]

improve docs, no test cases needed.

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 50s		Docker mode activated.
			_ Prechecks _
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+0 🆗	markdownlint	0m 0s		markdownlint was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
			_ trunk Compile Tests _
+1 💚	mvninstall	32m 6s		trunk passed
+1 💚	mvnsite	0m 30s		trunk passed
+1 💚	shadedclient	51m 52s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 15s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	0m 19s		the patch passed
+1 💚	shadedclient	18m 52s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	asflicense	0m 35s		The patch does not generate ASF License warnings.
		73m 58s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3657/1/artifact/out/Dockerfile
GITHUB PR	#3657
Optional Tests	dupname asflicense mvnsite codespell markdownlint
uname	Linux ee2008b0b81c 4.15.0-58-generic #64-Ubuntu SMP Tue Aug 6 11:12:41 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
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modules	C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site U: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3657/1/console
versions	git=2.25.1 maven=3.6.3
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[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 48s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+0 🆗	markdownlint	0m 0s		markdownlint was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
-1 ❌	test4tests	0m 0s		The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.
			_ trunk Compile Tests _
+0 🆗	mvndep	13m 11s		Maven dependency ordering for branch
+1 💚	mvninstall	21m 36s		trunk passed
+1 💚	compile	21m 45s		trunk passed with JDK Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04
+1 💚	compile	18m 54s		trunk passed with JDK Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10
+1 💚	mvnsite	3m 19s		trunk passed
+1 💚	javadoc	2m 51s		trunk passed with JDK Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04
+1 💚	javadoc	3m 19s		trunk passed with JDK Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10
+1 💚	shadedclient	104m 38s		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	2m 4s		the patch passed
+1 💚	compile	20m 57s		the patch passed with JDK Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04
+1 💚	javac	20m 57s		the patch passed
+1 💚	compile	19m 8s		the patch passed with JDK Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10
+1 💚	javac	19m 8s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	3m 17s		the patch passed
+1 💚	xml	0m 1s		The patch has no ill-formed XML file.
+1 💚	javadoc	2m 45s		the patch passed with JDK Ubuntu-11.0.11+9-Ubuntu-0ubuntu2.20.04
+1 💚	javadoc	3m 17s		the patch passed with JDK Private Build-1.8.0_292-8u292-b10-0ubuntu1~20.04-b10
+1 💚	shadedclient	27m 53s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	227m 57s		hadoop-hdfs in the patch passed.
+1 💚	unit	5m 8s		hadoop-yarn-common in the patch passed.
+1 💚	unit	0m 47s		hadoop-yarn-site in the patch passed.
+1 💚	asflicense	1m 10s		The patch does not generate ASF License warnings.
		417m 35s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3657/2/artifact/out/Dockerfile
GITHUB PR	#3657
Optional Tests	dupname asflicense mvnsite codespell markdownlint compile javac javadoc mvninstall unit shadedclient xml
uname	Linux 9cd2261cd332 4.15.0-58-generic #64-Ubuntu SMP Tue Aug 6 11:12:41 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
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Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3657/2/testReport/
Max. process+thread count	3313 (vs. ulimit of 5500)
modules	C: hadoop-hdfs-project/hadoop-hdfs hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common hadoop-yarn-project/hadoop-yarn/hadoop-yarn-site U: .
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3657/2/console
versions	git=2.25.1 maven=3.6.3
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[GuoPhilipse]

@szilard-nemeth ,Could you kindly help review ? Thanx

[szilard-nemeth]

Hi @GuoPhilipse ,
Did you close the PR on purpose?

[GuoPhilipse]

Hi @GuoPhilipse , Did you close the PR on purpose?

sorry, i deleted this branch by mistake, i have updated in another pr:
#3680