MAPREDUCE-7384. impove import * In MapReduce Project.

[slfan1989]

JIRA: MAPREDUCE-7384. impove import * In MapReduce Project.
Directly using * to reference does not conform to the code specification, adjust it and refer to the specified package.

[slfan1989]

The improvement work needs to continue for a period of time.

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 44s		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.
+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 _
+1 💚	mvninstall	38m 22s		trunk passed
+1 💚	compile	0m 28s		trunk passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	compile	0m 26s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	checkstyle	0m 30s		trunk passed
+1 💚	mvnsite	0m 31s		trunk passed
+1 💚	javadoc	0m 40s		trunk passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javadoc	0m 28s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	0m 59s		trunk passed
+1 💚	shadedclient	20m 2s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 23s		the patch passed
+1 💚	compile	0m 21s		the patch passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javac	0m 21s		the patch passed
+1 💚	compile	0m 22s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	javac	0m 22s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 16s		hadoop-mapreduce-project/hadoop-mapreduce-examples: The patch generated 0 new + 9 unchanged - 9 fixed = 9 total (was 18)
+1 💚	mvnsite	0m 22s		the patch passed
+1 💚	javadoc	0m 19s		the patch passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javadoc	0m 18s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	0m 55s		the patch passed
+1 💚	shadedclient	20m 2s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	0m 45s		hadoop-mapreduce-examples in the patch passed.
+1 💚	asflicense	0m 37s		The patch does not generate ASF License warnings.
		89m 25s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4390/1/artifact/out/Dockerfile
GITHUB PR	#4390
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux c09b82bd4f16 4.15.0-169-generic #177-Ubuntu SMP Thu Feb 3 10:50:38 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 6488b22
Default Java	Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1 /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-4390/1/testReport/
Max. process+thread count	755 (vs. ulimit of 5500)
modules	C: hadoop-mapreduce-project/hadoop-mapreduce-examples U: hadoop-mapreduce-project/hadoop-mapreduce-examples
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4390/1/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

This message was automatically generated.

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 50s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 1s		codespell was not available.
+0 🆗	detsecrets	0m 1s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	test4tests	0m 0s		The patch appears to include 5 new or modified test files.
			_ trunk Compile Tests _
+0 🆗	mvndep	14m 42s		Maven dependency ordering for branch
+1 💚	mvninstall	27m 15s		trunk passed
+1 💚	compile	2m 47s		trunk passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	compile	2m 21s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	checkstyle	1m 10s		trunk passed
+1 💚	mvnsite	2m 35s		trunk passed
+1 💚	javadoc	2m 14s		trunk passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javadoc	1m 49s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	4m 31s		trunk passed
+1 💚	shadedclient	20m 2s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 28s		Maven dependency ordering for patch
+1 💚	mvninstall	1m 50s		the patch passed
+1 💚	compile	2m 45s		the patch passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javac	2m 45s		the patch passed
+1 💚	compile	2m 14s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	javac	2m 14s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 50s		hadoop-mapreduce-project: The patch generated 0 new + 61 unchanged - 14 fixed = 61 total (was 75)
+1 💚	mvnsite	1m 57s		the patch passed
+1 💚	javadoc	1m 28s		the patch passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javadoc	1m 26s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	4m 32s		the patch passed
+1 💚	shadedclient	19m 48s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	6m 11s		hadoop-mapreduce-client-core in the patch passed.
-1 ❌	unit	1m 3s	/patch-unit-hadoop-mapreduce-project_hadoop-mapreduce-client_hadoop-mapreduce-client-common.txt	hadoop-mapreduce-client-common in the patch passed.
+1 💚	unit	8m 26s		hadoop-mapreduce-client-app in the patch passed.
+1 💚	unit	0m 46s		hadoop-mapreduce-examples in the patch passed.
+1 💚	asflicense	0m 40s		The patch does not generate ASF License warnings.
		137m 35s

Reason	Tests
Failed junit tests	hadoop.mapred.TestLocalDistributedCacheManager

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4390/2/artifact/out/Dockerfile
GITHUB PR	#4390
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux b52f928dc7f7 4.15.0-169-generic #177-Ubuntu SMP Thu Feb 3 10:50:38 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 53e8b3a
Default Java	Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1 /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-4390/2/testReport/
Max. process+thread count	1572 (vs. ulimit of 5500)
modules	C: hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app hadoop-mapreduce-project/hadoop-mapreduce-examples U: hadoop-mapreduce-project
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4390/2/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

This message was automatically generated.

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 58s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 1s		codespell was not available.
+0 🆗	detsecrets	0m 1s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	test4tests	0m 0s		The patch appears to include 15 new or modified test files.
			_ trunk Compile Tests _
+0 🆗	mvndep	15m 0s		Maven dependency ordering for branch
+1 💚	mvninstall	24m 54s		trunk passed
+1 💚	compile	2m 57s		trunk passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	compile	2m 37s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	checkstyle	1m 27s		trunk passed
+1 💚	mvnsite	3m 41s		trunk passed
+1 💚	javadoc	3m 18s		trunk passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javadoc	3m 3s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	5m 28s		trunk passed
+1 💚	shadedclient	20m 31s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 30s		Maven dependency ordering for patch
+1 💚	mvninstall	2m 25s		the patch passed
+1 💚	compile	2m 41s		the patch passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javac	2m 41s		the patch passed
+1 💚	compile	2m 19s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	javac	2m 19s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	1m 4s		hadoop-mapreduce-project: The patch generated 0 new + 188 unchanged - 21 fixed = 188 total (was 209)
+1 💚	mvnsite	2m 37s		the patch passed
+1 💚	javadoc	2m 6s		the patch passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javadoc	1m 55s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	4m 55s		the patch passed
+1 💚	shadedclient	20m 0s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	6m 38s		hadoop-mapreduce-client-core in the patch passed.
-1 ❌	unit	1m 18s	/patch-unit-hadoop-mapreduce-project_hadoop-mapreduce-client_hadoop-mapreduce-client-common.txt	hadoop-mapreduce-client-common in the patch passed.
+1 💚	unit	8m 45s		hadoop-mapreduce-client-app in the patch passed.
+1 💚	unit	1m 4s		hadoop-mapreduce-examples in the patch passed.
+1 💚	asflicense	0m 53s		The patch does not generate ASF License warnings.
		146m 4s

Reason	Tests
Failed junit tests	hadoop.mapred.TestLocalDistributedCacheManager

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4390/3/artifact/out/Dockerfile
GITHUB PR	#4390
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 2d7d8acff4b9 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 / e3d2367
Default Java	Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1 /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-4390/3/testReport/
Max. process+thread count	1561 (vs. ulimit of 5500)
modules	C: hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-common hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-app hadoop-mapreduce-project/hadoop-mapreduce-examples U: hadoop-mapreduce-project
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4390/3/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

This message was automatically generated.

[steveloughran]

-1 to all needless import changes, even if cleanup. import changes are the nightmare of cherrypicks, which is why we so rarely clean them up, even ongoing patches. given a choice between "messy imports in existing code" and "backport hell", i will take the mess.

further reading
https://github.com/steveloughran/formality/blob/master/styleguide/styleguide.md

[slfan1989]

@steveloughran Thanks for your suggestion, I have understood the spec, this pr will be closed, and I will explain it in jira.

[ayushtkn]

further reading
https://github.com/steveloughran/formality/blob/master/styleguide/styleguide.md

This doc is cool, worth having a link in the see also section of Hadoop-How-To-Contribute:
https://cwiki.apache.org/confluence/display/HADOOP/How+To+Contribute#HowToContribute-SeeAlso

[slfan1989]

further reading
https://github.com/steveloughran/formality/blob/master/styleguide/styleguide.md

This doc is cool, worth having a link in the see also section of Hadoop-How-To-Contribute: https://cwiki.apache.org/confluence/display/HADOOP/How+To+Contribute#HowToContribute-SeeAlso

@ayushtkn Thank you very much, I will read it carefully.