HBASE-29233: Capture scan metrics at region level

[sanjeet006py]

Cherry-pick of #6868 for HBase 2.

Modifications done for HBase 2:

• Sync HBase client read path is different in HBase 2 from HBase 3 and 4. Thus, modifications have been done to handle only this part.
• In HBase 3 and 4, scan metrics by region are available for sync and async client both for STRONG consistency and TIMELINE consistency. But in HBase 2, for sync client with TIMELINE consistency, scan metrics by region is not supported. If users enable the flag then in constructor of ClientScanner we disable it and log a warning stating the same.
• In ClientScanner used by sync clients, two modifications have been done to add support for scan metrics by region:
  - In moveToNextRegion() we conditionally call scanMetrics.moveToNextRegion().
  - We initialize the ScanMetricsRegionInfo at same time when we capture current region being scanned in ClientScanner. Code to capture current region being scanned was already there in ClientScanner.
• From HBase 3 onwards, scan metrics for NSRE count and milliseconds spent b/w two consecutive next() calls, are not used. But in HBase 2 both above metrics are used so, they also had to be initialized in ScanMetrics.moveToNextRegion() and ITs had to be adjusted accordingly.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 55s		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 💚	hbaseanti	0m 0s		Patch does not have any anti-patterns.
			_ branch-2.6 Compile Tests _
+0 🆗	mvndep	0m 35s		Maven dependency ordering for branch
+1 💚	mvninstall	4m 12s		branch-2.6 passed
+1 💚	compile	7m 36s		branch-2.6 passed
+1 💚	checkstyle	1m 24s		branch-2.6 passed
+1 💚	spotbugs	12m 5s		branch-2.6 passed
+1 💚	spotless	1m 7s		branch has no errors when running spotless:check.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 16s		Maven dependency ordering for patch
+1 💚	mvninstall	3m 37s		the patch passed
+1 💚	compile	7m 25s		the patch passed
-0 ⚠️	javac	7m 25s	/results-compile-javac-root.txt	root generated 2 new + 1268 unchanged - 2 fixed = 1270 total (was 1270)
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	1m 40s		the patch passed
+1 💚	spotbugs	13m 57s		the patch passed
+1 💚	hadoopcheck	19m 21s		Patch does not cause any errors with Hadoop 2.10.2 or 3.3.6 3.4.0.
+1 💚	spotless	0m 48s		patch has no errors when running spotless:check.
			_ Other Tests _
+1 💚	asflicense	0m 37s		The patch does not generate ASF License warnings.
		78m 45s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7132/2/artifact/yetus-general-check/output/Dockerfile
GITHUB PR	#7132
Optional Tests	dupname asflicense codespell detsecrets spotless javac spotbugs checkstyle compile hadoopcheck hbaseanti
uname	Linux 19896351b483 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-2.6 / 19457bb
Default Java	Eclipse Adoptium-11.0.23+9
Max. process+thread count	179 (vs. ulimit of 30000)
modules	C: hbase-client hbase-server . U: .
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7132/2/console
versions	git=2.34.1 maven=3.9.8 spotbugs=4.7.3
Powered by	Apache Yetus 0.15.0 https://yetus.apache.org

This message was automatically generated.

[Apache-HBase]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 58s		Docker mode activated.
-0 ⚠️	yetus	0m 5s		Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --author-ignore-list --blanks-eol-ignore-file --blanks-tabs-ignore-file --quick-hadoopcheck
			_ Prechecks _
			_ branch-2.6 Compile Tests _
+0 🆗	mvndep	0m 11s		Maven dependency ordering for branch
+1 💚	mvninstall	3m 18s		branch-2.6 passed
+1 💚	compile	2m 15s		branch-2.6 passed
+1 💚	javadoc	2m 45s		branch-2.6 passed
+1 💚	shadedjars	6m 37s		branch has no errors when building our shaded downstream artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 12s		Maven dependency ordering for patch
+1 💚	mvninstall	3m 18s		the patch passed
+1 💚	compile	2m 12s		the patch passed
+1 💚	javac	2m 12s		the patch passed
+1 💚	javadoc	2m 51s		the patch passed
+1 💚	shadedjars	6m 14s		patch has no errors when building our shaded downstream artifacts.
			_ Other Tests _
-1 ❌	unit	37m 40s	/patch-unit-root.txt	root in the patch failed.
		71m 27s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7132/2/artifact/yetus-jdk8-hadoop2-check/output/Dockerfile
GITHUB PR	#7132
Optional Tests	javac javadoc unit compile shadedjars
uname	Linux 319b98ff678a 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-2.6 / 19457bb
Default Java	Temurin-1.8.0_412-b08
Test Results	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7132/2/testReport/
Max. process+thread count	2439 (vs. ulimit of 30000)
modules	C: hbase-client hbase-server . U: .
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7132/2/console
versions	git=2.34.1 maven=3.9.8
Powered by	Apache Yetus 0.15.0 https://yetus.apache.org

This message was automatically generated.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 52s		Docker mode activated.
-0 ⚠️	yetus	0m 6s		Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --author-ignore-list --blanks-eol-ignore-file --blanks-tabs-ignore-file --quick-hadoopcheck
			_ Prechecks _
			_ branch-2.6 Compile Tests _
+0 🆗	mvndep	0m 14s		Maven dependency ordering for branch
+1 💚	mvninstall	3m 25s		branch-2.6 passed
+1 💚	compile	2m 23s		branch-2.6 passed
+1 💚	javadoc	3m 11s		branch-2.6 passed
+1 💚	shadedjars	7m 51s		branch has no errors when building our shaded downstream artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 14s		Maven dependency ordering for patch
+1 💚	mvninstall	3m 25s		the patch passed
+1 💚	compile	3m 9s		the patch passed
+1 💚	javac	3m 9s		the patch passed
-0 ⚠️	javadoc	0m 28s	/results-javadoc-javadoc-hbase-client.txt	hbase-client generated 11 new + 83 unchanged - 0 fixed = 94 total (was 83)
-0 ⚠️	javadoc	2m 23s	/results-javadoc-javadoc-root.txt	root generated 11 new + 199 unchanged - 0 fixed = 210 total (was 199)
+1 💚	shadedjars	6m 51s		patch has no errors when building our shaded downstream artifacts.
			_ Other Tests _
+1 💚	unit	304m 45s		root in the patch passed.
		347m 31s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7132/2/artifact/yetus-jdk11-hadoop3-check/output/Dockerfile
GITHUB PR	#7132
Optional Tests	javac javadoc unit compile shadedjars
uname	Linux a49221a91cea 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-2.6 / 19457bb
Default Java	Eclipse Adoptium-11.0.23+9
Test Results	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7132/2/testReport/
Max. process+thread count	9047 (vs. ulimit of 30000)
modules	C: hbase-client hbase-server . U: .
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7132/2/console
versions	git=2.34.1 maven=3.9.8
Powered by	Apache Yetus 0.15.0 https://yetus.apache.org

This message was automatically generated.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 53s		Docker mode activated.
-0 ⚠️	yetus	0m 6s		Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --author-ignore-list --blanks-eol-ignore-file --blanks-tabs-ignore-file --quick-hadoopcheck
			_ Prechecks _
			_ branch-2.6 Compile Tests _
+0 🆗	mvndep	0m 12s		Maven dependency ordering for branch
+1 💚	mvninstall	4m 17s		branch-2.6 passed
+1 💚	compile	3m 6s		branch-2.6 passed
+1 💚	javadoc	3m 22s		branch-2.6 passed
+1 💚	shadedjars	7m 1s		branch has no errors when building our shaded downstream artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 13s		Maven dependency ordering for patch
+1 💚	mvninstall	3m 24s		the patch passed
+1 💚	compile	2m 23s		the patch passed
+1 💚	javac	2m 23s		the patch passed
+1 💚	javadoc	3m 11s		the patch passed
+1 💚	shadedjars	7m 3s		patch has no errors when building our shaded downstream artifacts.
			_ Other Tests _
+1 💚	unit	317m 44s		root in the patch passed.
		360m 45s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7132/2/artifact/yetus-jdk17-hadoop3-check/output/Dockerfile
GITHUB PR	#7132
Optional Tests	javac javadoc unit compile shadedjars
uname	Linux 75ef32672d75 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-2.6 / 19457bb
Default Java	Eclipse Adoptium-17.0.11+9
Test Results	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7132/2/testReport/
Max. process+thread count	8803 (vs. ulimit of 30000)
modules	C: hbase-client hbase-server . U: .
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7132/2/console
versions	git=2.34.1 maven=3.9.8
Powered by	Apache Yetus 0.15.0 https://yetus.apache.org

This message was automatically generated.

[virajjasani]

+1