HBASE-29837 Backport HBASE-27355 Separate meta read requests from master and client (#7261) #7652

Umeshkumar9414 · 2026-01-20T13:30:04Z

Because, MetaTableAccessor moved to hbase-server in master/branch-3 in HBASE-24609 and HBASE-25758, cherry-pick of HBASE-27355 was not clean.

This is an important improvement and I think needed in 2.x as well.

…e#7261) Co-authored-by: huiruan <[email protected]> Signed-off-by: Duo Zhang <[email protected]> Reviewed-by: Aman Poonia <[email protected]>

Umeshkumar9414 · 2026-01-20T13:39:41Z

hbase-common/src/main/java/org/apache/hadoop/hbase/HConstants.java

  public static final int HIGH_QOS = 200;
  public static final int SYSTEMTABLE_QOS = HIGH_QOS;
+  // QOS for internal meta read requests
+  public static final int INTERNAL_READ_QOS = 250;


I also thought of another approch where we can define INTERNAL_READ_QOS in AnnotationReadingPriorityFunction (hbase-server module) and then let the master pass the priority while requesting to MetaTableAccessor, but that way we would end up doing many changes.

Umeshkumar9414 · 2026-01-20T13:44:26Z

@frostruan , @Apache9 , @mnpoonia please review.

Umeshkumar9414 · 2026-01-20T19:02:58Z

Same tests, TestSecureIPC, were passing in the previous build. So I think we can ignore Test failure.

Apache-HBase · 2026-01-20T19:22:59Z

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 57s		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 Compile Tests _
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+1 💚	mvninstall	4m 55s		branch-2 passed
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+1 💚	checkstyle	1m 25s		branch-2 passed
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+1 💚	spotless	1m 24s		branch has no errors when running spotless:check.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 18s		Maven dependency ordering for patch
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+1 💚	compile	5m 33s		the patch passed
+1 💚	javac	5m 33s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	1m 24s		the patch passed
+1 💚	spotbugs	4m 48s		the patch passed
+1 💚	hadoopcheck	23m 15s		Patch does not cause any errors with Hadoop 2.10.2 or 3.3.6 3.4.1.
+1 💚	spotless	1m 4s		patch has no errors when running spotless:check.
			_ Other Tests _
+1 💚	asflicense	0m 40s		The patch does not generate ASF License warnings.
		63m 9s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7652/2/artifact/yetus-general-check/output/Dockerfile
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versions	git=2.34.1 maven=3.9.8 spotbugs=4.7.3
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Apache-HBase · 2026-01-20T22:50:26Z

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	1m 34s		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 Compile Tests _
+0 🆗	mvndep	0m 11s		Maven dependency ordering for branch
+1 💚	mvninstall	2m 13s		branch-2 passed
+1 💚	compile	1m 2s		branch-2 passed
+1 💚	javadoc	0m 43s		branch-2 passed
+1 💚	shadedjars	3m 49s		branch has no errors when building our shaded downstream artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 11s		Maven dependency ordering for patch
+1 💚	mvninstall	1m 50s		the patch passed
+1 💚	compile	1m 0s		the patch passed
+1 💚	javac	1m 0s		the patch passed
+1 💚	javadoc	0m 42s		the patch passed
+1 💚	shadedjars	3m 47s		patch has no errors when building our shaded downstream artifacts.
			_ Other Tests _
+1 💚	unit	1m 45s		hbase-common in the patch passed.
+1 💚	unit	7m 30s		hbase-client in the patch passed.
-1 ❌	unit	239m 13s	/patch-unit-hbase-server.txt	hbase-server in the patch failed.
		270m 12s

Subsystem	Report/Notes
Docker	ClientAPI=1.48 ServerAPI=1.48 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7652/2/artifact/yetus-jdk8-hadoop2-check/output/Dockerfile
GITHUB PR	#7652
Optional Tests	javac javadoc unit compile shadedjars
uname	Linux d6083d1b9b21 6.8.0-1024-aws #26~22.04.1-Ubuntu SMP Wed Feb 19 06:54:57 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
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git revision	branch-2 / `5ffb430`
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Apache-HBase · 2026-01-20T22:59:38Z

🎊 +1 overall

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+0 🆗	reexec	0m 57s		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 Compile Tests _
+0 🆗	mvndep	0m 19s		Maven dependency ordering for branch
+1 💚	mvninstall	3m 48s		branch-2 passed
+1 💚	compile	1m 53s		branch-2 passed
+1 💚	javadoc	1m 14s		branch-2 passed
+1 💚	shadedjars	6m 24s		branch has no errors when building our shaded downstream artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 21s		Maven dependency ordering for patch
+1 💚	mvninstall	3m 11s		the patch passed
+1 💚	compile	1m 27s		the patch passed
+1 💚	javac	1m 27s		the patch passed
+1 💚	javadoc	0m 59s		the patch passed
+1 💚	shadedjars	6m 1s		patch has no errors when building our shaded downstream artifacts.
			_ Other Tests _
+1 💚	unit	2m 32s		hbase-common in the patch passed.
+1 💚	unit	8m 6s		hbase-client in the patch passed.
+1 💚	unit	236m 50s		hbase-server in the patch passed.
		279m 52s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7652/2/artifact/yetus-jdk11-hadoop3-check/output/Dockerfile
GITHUB PR	#7652
Optional Tests	javac javadoc unit compile shadedjars
uname	Linux 18084680cf01 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 / `5ffb430`
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Max. process+thread count	3278 (vs. ulimit of 30000)
modules	C: hbase-common hbase-client hbase-server U: .
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7652/2/console
versions	git=2.34.1 maven=3.9.8
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Apache-HBase · 2026-01-20T23:17:39Z

🎊 +1 overall

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+0 🆗	reexec	1m 17s		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 Compile Tests _
+0 🆗	mvndep	0m 14s		Maven dependency ordering for branch
+1 💚	mvninstall	4m 44s		branch-2 passed
+1 💚	compile	2m 17s		branch-2 passed
+1 💚	javadoc	1m 26s		branch-2 passed
+1 💚	shadedjars	7m 14s		branch has no errors when building our shaded downstream artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 19s		Maven dependency ordering for patch
+1 💚	mvninstall	4m 21s		the patch passed
+1 💚	compile	2m 15s		the patch passed
+1 💚	javac	2m 15s		the patch passed
+1 💚	javadoc	1m 27s		the patch passed
+1 💚	shadedjars	7m 8s		patch has no errors when building our shaded downstream artifacts.
			_ Other Tests _
+1 💚	unit	3m 14s		hbase-common in the patch passed.
+1 💚	unit	8m 3s		hbase-client in the patch passed.
+1 💚	unit	246m 17s		hbase-server in the patch passed.
		297m 48s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7652/2/artifact/yetus-jdk17-hadoop3-check/output/Dockerfile
GITHUB PR	#7652
Optional Tests	javac javadoc unit compile shadedjars
uname	Linux 29325373184e 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 / `5ffb430`
Default Java	Eclipse Adoptium-17.0.11+9
Test Results	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7652/2/testReport/
Max. process+thread count	3104 (vs. ulimit of 30000)
modules	C: hbase-common hbase-client hbase-server U: .
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7652/2/console
versions	git=2.34.1 maven=3.9.8
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HBASE-27355 Separate meta read requests from master and client (apach…

12c05d5

…e#7261) Co-authored-by: huiruan <[email protected]> Signed-off-by: Duo Zhang <[email protected]> Reviewed-by: Aman Poonia <[email protected]>

Umeshkumar9414 mentioned this pull request Jan 20, 2026

HBASE-29141 Calculate default maxQueueLength call queues correctly #7620

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HBASE-29837 Backport HBASE-27355 Separate meta read requests from master and client (#7261) #7652

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