YARN-10576. Update Capacity Scheduler documentation about JSON-based …

[brumi1024]

…placement mapping

Description of PR

How was this patch tested?

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	1m 5s		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.
			_ trunk Compile Tests _
+1 💚	mvninstall	33m 40s		trunk passed
+1 💚	mvnsite	0m 28s		trunk passed
+1 💚	shadedclient	50m 6s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 12s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	0m 17s		the patch passed
+1 💚	shadedclient	16m 4s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	asflicense	0m 30s		The patch does not generate ASF License warnings.
		69m 44s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3333/1/artifact/out/Dockerfile
GITHUB PR	#3333
Optional Tests	dupname asflicense mvnsite codespell markdownlint
uname	Linux 3a4550ff8c7c 4.15.0-143-generic #147-Ubuntu SMP Wed Apr 14 16:10:11 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 75e929e
Max. process+thread count	518 (vs. ulimit of 5500)
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-3333/1/console
versions	git=2.25.1 maven=3.6.3
Powered by	Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org

This message was automatically generated.

[9uapaw]

Thank you @bteke for working on this issue. A very detailed and useful change, generally looks good, only found minor issues.

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 56s		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.
			_ trunk Compile Tests _
+1 💚	mvninstall	33m 48s		trunk passed
+1 💚	mvnsite	0m 24s		trunk passed
+1 💚	shadedclient	49m 56s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 12s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	0m 17s		the patch passed
+1 💚	shadedclient	16m 4s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	asflicense	0m 29s		The patch does not generate ASF License warnings.
		69m 17s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3333/2/artifact/out/Dockerfile
GITHUB PR	#3333
Optional Tests	dupname asflicense mvnsite codespell markdownlint
uname	Linux 2cd0c72dac8f 4.15.0-143-generic #147-Ubuntu SMP Wed Apr 14 16:10:11 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 3e5c041
Max. process+thread count	520 (vs. ulimit of 5500)
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-3333/2/console
versions	git=2.25.1 maven=3.6.3
Powered by	Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org

This message was automatically generated.