HBASE-27991 [hbase-examples] MultiThreadedClientExample throws java.l…

[NihalJain]

…ang.ClassCastException

[NihalJain]

Backports #5346
Raised on behalf of @nikita15p

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	1m 19s	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 _
		_ branch-2 Compile Tests _
+1 💚	mvninstall	2m 48s	branch-2 passed
+1 💚	compile	0m 14s	branch-2 passed
+1 💚	shadedjars	4m 55s	branch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 14s	branch-2 passed
		_ Patch Compile Tests _
+1 💚	mvninstall	2m 10s	the patch passed
+1 💚	compile	0m 13s	the patch passed
+1 💚	javac	0m 13s	the patch passed
+1 💚	shadedjars	4m 53s	patch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 11s	the patch passed
		_ Other Tests _
+1 💚	unit	1m 37s	hbase-examples in the patch passed.
		19m 31s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-5425/1/artifact/yetus-jdk8-hadoop2-check/output/Dockerfile
GITHUB PR	#5425
Optional Tests	javac javadoc unit shadedjars compile
uname	Linux a0396a4c779e 5.4.0-1103-aws #111~18.04.1-Ubuntu SMP Tue May 23 20:04:10 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	branch-2 / 3ddadcf
Default Java	Temurin-1.8.0_352-b08
Test Results	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-5425/1/testReport/
Max. process+thread count	1654 (vs. ulimit of 30000)
modules	C: hbase-examples U: hbase-examples
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-5425/1/console
versions	git=2.34.1 maven=3.8.6
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	0m 17s	Docker mode activated.
-0 ⚠️	yetus	0m 5s	Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --whitespace-eol-ignore-list --whitespace-tabs-ignore-list --quick-hadoopcheck
		_ Prechecks _
		_ branch-2 Compile Tests _
+1 💚	mvninstall	3m 28s	branch-2 passed
+1 💚	compile	0m 19s	branch-2 passed
+1 💚	shadedjars	5m 24s	branch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 18s	branch-2 passed
		_ Patch Compile Tests _
+1 💚	mvninstall	2m 46s	the patch passed
+1 💚	compile	0m 17s	the patch passed
+1 💚	javac	0m 17s	the patch passed
+1 💚	shadedjars	4m 54s	patch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 15s	the patch passed
		_ Other Tests _
+1 💚	unit	1m 40s	hbase-examples in the patch passed.
		20m 32s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-5425/1/artifact/yetus-jdk11-hadoop3-check/output/Dockerfile
GITHUB PR	#5425
Optional Tests	javac javadoc unit shadedjars compile
uname	Linux 1105512afd9c 5.4.0-153-generic #170-Ubuntu SMP Fri Jun 16 13:43:31 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	branch-2 / 3ddadcf
Default Java	Eclipse Adoptium-11.0.17+8
Test Results	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-5425/1/testReport/
Max. process+thread count	1478 (vs. ulimit of 30000)
modules	C: hbase-examples U: hbase-examples
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-5425/1/console
versions	git=2.34.1 maven=3.8.6
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	0m 42s	Docker mode activated.
		_ Prechecks _
+1 💚	dupname	0m 1s	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.
		_ branch-2 Compile Tests _
+1 💚	mvninstall	3m 52s	branch-2 passed
+1 💚	compile	0m 26s	branch-2 passed
+1 💚	checkstyle	0m 12s	branch-2 passed
+1 💚	spotless	0m 55s	branch has no errors when running spotless:check.
+1 💚	spotbugs	0m 33s	branch-2 passed
		_ Patch Compile Tests _
+1 💚	mvninstall	3m 22s	the patch passed
+1 💚	compile	0m 25s	the patch passed
-0 ⚠️	javac	0m 25s	hbase-examples generated 1 new + 13 unchanged - 0 fixed = 14 total (was 13)
+1 💚	checkstyle	0m 10s	the patch passed
+1 💚	whitespace	0m 0s	The patch has no whitespace issues.
+1 💚	hadoopcheck	16m 50s	Patch does not cause any errors with Hadoop 2.10.2 or 3.2.4 3.3.6.
+1 💚	spotless	0m 45s	patch has no errors when running spotless:check.
+1 💚	spotbugs	0m 37s	the patch passed
		_ Other Tests _
+1 💚	asflicense	0m 10s	The patch does not generate ASF License warnings.
		30m 23s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-5425/1/artifact/yetus-general-check/output/Dockerfile
GITHUB PR	#5425
Optional Tests	dupname asflicense javac spotbugs hadoopcheck hbaseanti spotless checkstyle compile
uname	Linux 5f19ff8d6f4e 5.4.0-1103-aws #111~18.04.1-Ubuntu SMP Tue May 23 20:04:10 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	branch-2 / 3ddadcf
Default Java	Eclipse Adoptium-11.0.17+8
javac	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-5425/1/artifact/yetus-general-check/output/diff-compile-javac-hbase-examples.txt
Max. process+thread count	79 (vs. ulimit of 30000)
modules	C: hbase-examples U: hbase-examples
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-5425/1/console
versions	git=2.34.1 maven=3.8.6 spotbugs=4.7.3
Powered by	Apache Yetus 0.12.0 https://yetus.apache.org

This message was automatically generated.

[NihalJain]

Will merge this to branch-2 tomorrow!

Also as mentioned earlier in #5346 MultiThreadedClientExample is broken on branch-2.x . This patch fixes the issue and adds a test for ensuring it does not break again in future. Please let me know if we would want this in branch-2.5, branch-2.4
CC: @Apache9 , @ndimiduk, @petersomogyi