HBASE-25872 Add documentation for LoadBalancer about synchronization

[Apache9]

No description provided.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	1m 28s	Docker mode activated.
-0 ⚠️	yetus	0m 3s	Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --whitespace-eol-ignore-list --whitespace-tabs-ignore-list --quick-hadoopcheck
		_ Prechecks _
		_ master Compile Tests _
+1 💚	mvninstall	4m 38s	master passed
+1 💚	compile	0m 21s	master passed
+1 💚	shadedjars	9m 31s	branch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 19s	master passed
		_ Patch Compile Tests _
+1 💚	mvninstall	4m 5s	the patch passed
+1 💚	compile	0m 20s	the patch passed
+1 💚	javac	0m 20s	the patch passed
+1 💚	shadedjars	9m 23s	patch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 17s	the patch passed
		_ Other Tests _
+1 💚	unit	0m 31s	hbase-balancer in the patch passed.
		32m 12s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3267/1/artifact/yetus-jdk8-hadoop3-check/output/Dockerfile
GITHUB PR	#3267
Optional Tests	javac javadoc unit shadedjars compile
uname	Linux 36c4ba90b8b8 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
Personality	dev-support/hbase-personality.sh
git revision	master / 0955a7a
Default Java	AdoptOpenJDK-1.8.0_282-b08
Test Results	https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3267/1/testReport/
Max. process+thread count	284 (vs. ulimit of 30000)
modules	C: hbase-balancer U: hbase-balancer
Console output	https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3267/1/console
versions	git=2.17.1 maven=3.6.3
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[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	0m 31s	Docker mode activated.
		_ Prechecks _
+1 💚	dupname	0m 0s	No case conflicting files found.
+1 💚	hbaseanti	0m 0s	Patch does not have any anti-patterns.
+1 💚	@author	0m 0s	The patch does not contain any @author tags.
		_ master Compile Tests _
+1 💚	mvninstall	4m 4s	master passed
+1 💚	compile	0m 31s	master passed
+1 💚	checkstyle	0m 15s	master passed
+1 💚	spotbugs	0m 37s	master passed
		_ Patch Compile Tests _
+1 💚	mvninstall	3m 39s	the patch passed
+1 💚	compile	0m 27s	the patch passed
+1 💚	javac	0m 27s	the patch passed
+1 💚	checkstyle	0m 12s	the patch passed
+1 💚	whitespace	0m 0s	The patch has no whitespace issues.
+1 💚	hadoopcheck	18m 26s	Patch does not cause any errors with Hadoop 3.1.2 3.2.1 3.3.0.
+1 💚	spotbugs	0m 45s	the patch passed
		_ Other Tests _
+1 💚	asflicense	0m 14s	The patch does not generate ASF License warnings.
		37m 25s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3267/1/artifact/yetus-general-check/output/Dockerfile
GITHUB PR	#3267
Optional Tests	dupname asflicense javac spotbugs hadoopcheck hbaseanti checkstyle compile
uname	Linux 7bf014d031d9 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
Personality	dev-support/hbase-personality.sh
git revision	master / 0955a7a
Default Java	AdoptOpenJDK-1.8.0_282-b08
Max. process+thread count	96 (vs. ulimit of 30000)
modules	C: hbase-balancer U: hbase-balancer
Console output	https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3267/1/console
versions	git=2.17.1 maven=3.6.3 spotbugs=4.2.2
Powered by	Apache Yetus 0.12.0 https://yetus.apache.org

This message was automatically generated.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	1m 55s	Docker mode activated.
-0 ⚠️	yetus	0m 4s	Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --whitespace-eol-ignore-list --whitespace-tabs-ignore-list --quick-hadoopcheck
		_ Prechecks _
		_ master Compile Tests _
+1 💚	mvninstall	6m 5s	master passed
+1 💚	compile	0m 25s	master passed
+1 💚	shadedjars	11m 14s	branch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 22s	master passed
		_ Patch Compile Tests _
+1 💚	mvninstall	5m 43s	the patch passed
+1 💚	compile	0m 29s	the patch passed
+1 💚	javac	0m 29s	the patch passed
+1 💚	shadedjars	11m 10s	patch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 18s	the patch passed
		_ Other Tests _
+1 💚	unit	0m 33s	hbase-balancer in the patch passed.
		39m 39s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3267/1/artifact/yetus-jdk11-hadoop3-check/output/Dockerfile
GITHUB PR	#3267
Optional Tests	javac javadoc unit shadedjars compile
uname	Linux 0ca354dad4bb 4.15.0-65-generic #74-Ubuntu SMP Tue Sep 17 17:06:04 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / 0955a7a
Default Java	AdoptOpenJDK-11.0.10+9
Test Results	https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3267/1/testReport/
Max. process+thread count	205 (vs. ulimit of 30000)
modules	C: hbase-balancer U: hbase-balancer
Console output	https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3267/1/console
versions	git=2.17.1 maven=3.6.3
Powered by	Apache Yetus 0.12.0 https://yetus.apache.org

This message was automatically generated.

[ddupg]

+1