HDFS-16545. Provide an option to balance rack level in Balancers

[prasad-acit]

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	0m 40s		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 appears to include 1 new or modified test files.
			_ trunk Compile Tests _
+1 💚	mvninstall	38m 56s		trunk passed
+1 💚	compile	1m 45s		trunk passed with JDK Ubuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04
+1 💚	compile	1m 34s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	checkstyle	1m 25s		trunk passed
+1 💚	mvnsite	1m 42s		trunk passed
+1 💚	javadoc	1m 22s		trunk passed with JDK Ubuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04
+1 💚	javadoc	1m 49s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	3m 49s		trunk passed
+1 💚	shadedclient	23m 37s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	1m 22s		the patch passed
+1 💚	compile	1m 27s		the patch passed with JDK Ubuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04
-1 ❌	javac	1m 27s	/results-compile-javac-hadoop-hdfs-project_hadoop-hdfs-jdkUbuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04.txt	hadoop-hdfs-project_hadoop-hdfs-jdkUbuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04 with JDK Ubuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04 generated 1 new + 464 unchanged - 1 fixed = 465 total (was 465)
+1 💚	compile	1m 20s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
-1 ❌	javac	1m 20s	/results-compile-javac-hadoop-hdfs-project_hadoop-hdfs-jdkPrivateBuild-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07.txt	hadoop-hdfs-project_hadoop-hdfs-jdkPrivateBuild-1.8.0_312-8u312-b07-0ubuntu120.04-b07 with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu120.04-b07 generated 1 new + 448 unchanged - 1 fixed = 449 total (was 449)
+1 💚	blanks	0m 0s		The patch has no blanks issues.
-0 ⚠️	checkstyle	1m 2s	/results-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs-project/hadoop-hdfs: The patch generated 19 new + 163 unchanged - 0 fixed = 182 total (was 163)
+1 💚	mvnsite	1m 21s		the patch passed
+1 💚	javadoc	0m 57s		the patch passed with JDK Ubuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04
+1 💚	javadoc	1m 32s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	3m 22s		the patch passed
+1 💚	shadedclient	22m 44s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
-1 ❌	unit	252m 57s	/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs in the patch passed.
+1 💚	asflicense	1m 15s		The patch does not generate ASF License warnings.
		363m 51s

Reason	Tests
Failed junit tests	hadoop.hdfs.server.datanode.TestBPOfferService

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4207/1/artifact/out/Dockerfile
GITHUB PR	#4207
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell markdownlint
uname	Linux 4caf153759d1 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 15feb7996f57d4e49163eeeecb53b6deed7ad899
Default Java	Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4207/1/testReport/
Max. process+thread count	3247 (vs. ulimit of 5500)
modules	C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4207/1/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
Powered by	Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org

This message was automatically generated.

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	12m 45s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 1s		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 appears to include 1 new or modified test files.
			_ trunk Compile Tests _
+1 💚	mvninstall	39m 28s		trunk passed
+1 💚	compile	1m 43s		trunk passed with JDK Ubuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04
+1 💚	compile	1m 37s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	checkstyle	1m 25s		trunk passed
+1 💚	mvnsite	1m 43s		trunk passed
+1 💚	javadoc	1m 18s		trunk passed with JDK Ubuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04
+1 💚	javadoc	1m 48s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	3m 41s		trunk passed
+1 💚	shadedclient	23m 32s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	1m 22s		the patch passed
+1 💚	compile	1m 27s		the patch passed with JDK Ubuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04
+1 💚	javac	1m 27s		the patch passed
+1 💚	compile	1m 19s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	javac	1m 19s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
-0 ⚠️	checkstyle	1m 1s	/results-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs-project/hadoop-hdfs: The patch generated 3 new + 163 unchanged - 0 fixed = 166 total (was 163)
+1 💚	mvnsite	1m 26s		the patch passed
+1 💚	javadoc	0m 58s		the patch passed with JDK Ubuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04
+1 💚	javadoc	1m 30s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	3m 21s		the patch passed
+1 💚	shadedclient	22m 29s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
-1 ❌	unit	250m 36s	/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs in the patch passed.
+1 💚	asflicense	1m 8s		The patch does not generate ASF License warnings.
		373m 39s

Reason	Tests
Failed junit tests	hadoop.hdfs.TestReconstructStripedFileWithRandomECPolicy

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4207/2/artifact/out/Dockerfile
GITHUB PR	#4207
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell markdownlint
uname	Linux cd6a553a0e43 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / d4509ec
Default Java	Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4207/2/testReport/
Max. process+thread count	3337 (vs. ulimit of 5500)
modules	C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4207/2/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
Powered by	Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org

This message was automatically generated.

[prasad-acit]

Failed UT is not related.
Checkstyle 1 not related & 2 related to param count which already exceeded.

@hemanthboyina @surendralilhore Can you please review the PR?

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	17m 34s		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 appears to include 1 new or modified test files.
			_ trunk Compile Tests _
+1 💚	mvninstall	39m 9s		trunk passed
+1 💚	compile	1m 45s		trunk passed with JDK Ubuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04
+1 💚	compile	1m 35s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	checkstyle	1m 24s		trunk passed
+1 💚	mvnsite	1m 44s		trunk passed
+1 💚	javadoc	1m 24s		trunk passed with JDK Ubuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04
+1 💚	javadoc	1m 47s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	3m 45s		trunk passed
+1 💚	shadedclient	23m 23s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	1m 25s		the patch passed
+1 💚	compile	1m 28s		the patch passed with JDK Ubuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04
+1 💚	javac	1m 28s		the patch passed
+1 💚	compile	1m 22s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	javac	1m 22s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
-0 ⚠️	checkstyle	1m 1s	/results-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs-project/hadoop-hdfs: The patch generated 3 new + 164 unchanged - 0 fixed = 167 total (was 164)
+1 💚	mvnsite	1m 26s		the patch passed
+1 💚	javadoc	0m 57s		the patch passed with JDK Ubuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04
+1 💚	javadoc	1m 28s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	3m 35s		the patch passed
+1 💚	shadedclient	23m 41s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
-1 ❌	unit	463m 59s	/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs in the patch passed.
+1 💚	asflicense	1m 11s		The patch does not generate ASF License warnings.
		592m 41s

Reason	Tests
Failed junit tests	hadoop.hdfs.server.diskbalancer.command.TestDiskBalancerCommand

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4207/3/artifact/out/Dockerfile
GITHUB PR	#4207
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell markdownlint
uname	Linux 4d8de28815f1 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / d4509ec
Default Java	Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.14.1+1-Ubuntu-0ubuntu1.20.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4207/3/testReport/
Max. process+thread count	2801 (vs. ulimit of 5500)
modules	C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4207/3/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
Powered by	Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org

This message was automatically generated.

[xiaoxiaopan118]

LGTM ！

[github-actions]

We're closing this stale PR because it has been open for 100 days with no activity. This isn't a judgement on the merit of the PR in any way. It's just a way of keeping the PR queue manageable.
If you feel like this was a mistake, or you would like to continue working on it, please feel free to re-open it and ask for a committer to remove the stale tag and review again.
Thanks all for your contribution.