HADOOP-19862: S3A: introduce configurable shared thread pool for AWS SDK clients

[konstantinb]

Description of PR

HADOOP-19862: S3A: introduce configurable shared thread pool for AWS SDK clients

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?

AI Tooling

If an AI tool was used:

• The PR includes the phrase "Contains content generated by "
  where is the name of the AI tool used.
• My use of AI contributions follows the ASF legal policy
  https://www.apache.org/legal/generative-tooling.html

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 33s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 1s		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 appears to include 1 new or modified test files.
			_ trunk Compile Tests _
+1 💚	mvninstall	41m 32s		trunk passed
+1 💚	compile	1m 10s		trunk passed with JDK Ubuntu-21.0.10+7-Ubuntu-124.04
+1 💚	compile	1m 10s		trunk passed with JDK Ubuntu-17.0.18+8-Ubuntu-124.04.1
+1 💚	checkstyle	1m 2s		trunk passed
+1 💚	mvnsite	1m 13s		trunk passed
+1 💚	javadoc	1m 5s		trunk passed with JDK Ubuntu-21.0.10+7-Ubuntu-124.04
+1 💚	javadoc	1m 2s		trunk passed with JDK Ubuntu-17.0.18+8-Ubuntu-124.04.1
+1 💚	spotbugs	1m 45s		trunk passed
+1 💚	shadedclient	28m 40s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
-1 ❌	mvninstall	0m 37s	/patch-mvninstall-hadoop-tools_hadoop-aws.txt	hadoop-aws in the patch failed.
-1 ❌	compile	0m 36s	/patch-compile-hadoop-tools_hadoop-aws-jdkUbuntu-21.0.10+7-Ubuntu-124.04.txt	hadoop-aws in the patch failed with JDK Ubuntu-21.0.10+7-Ubuntu-124.04.
-1 ❌	javac	0m 36s	/patch-compile-hadoop-tools_hadoop-aws-jdkUbuntu-21.0.10+7-Ubuntu-124.04.txt	hadoop-aws in the patch failed with JDK Ubuntu-21.0.10+7-Ubuntu-124.04.
-1 ❌	compile	0m 37s	/patch-compile-hadoop-tools_hadoop-aws-jdkUbuntu-17.0.18+8-Ubuntu-124.04.1.txt	hadoop-aws in the patch failed with JDK Ubuntu-17.0.18+8-Ubuntu-124.04.1.
-1 ❌	javac	0m 37s	/patch-compile-hadoop-tools_hadoop-aws-jdkUbuntu-17.0.18+8-Ubuntu-124.04.1.txt	hadoop-aws in the patch failed with JDK Ubuntu-17.0.18+8-Ubuntu-124.04.1.
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 27s		the patch passed
-1 ❌	mvnsite	0m 37s	/patch-mvnsite-hadoop-tools_hadoop-aws.txt	hadoop-aws in the patch failed.
+1 💚	javadoc	0m 31s		the patch passed with JDK Ubuntu-21.0.10+7-Ubuntu-124.04
+1 💚	javadoc	0m 30s		the patch passed with JDK Ubuntu-17.0.18+8-Ubuntu-124.04.1
-1 ❌	spotbugs	0m 37s	/patch-spotbugs-hadoop-tools_hadoop-aws.txt	hadoop-aws in the patch failed.
+1 💚	shadedclient	31m 5s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
-1 ❌	unit	0m 41s	/patch-unit-hadoop-tools_hadoop-aws.txt	hadoop-aws in the patch failed.
+1 💚	asflicense	0m 35s		The patch does not generate ASF License warnings.
		114m 3s

Subsystem	Report/Notes
Docker	ClientAPI=1.54 ServerAPI=1.54 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8426/1/artifact/out/Dockerfile
GITHUB PR	#8426
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux f5148ce9b6b2 5.15.0-164-generic #174-Ubuntu SMP Fri Nov 14 20:25:16 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / e6aad43
Default Java	Ubuntu-17.0.18+8-Ubuntu-124.04.1
Multi-JDK versions	/usr/lib/jvm/java-21-openjdk-amd64:Ubuntu-21.0.10+7-Ubuntu-124.04 /usr/lib/jvm/java-17-openjdk-amd64:Ubuntu-17.0.18+8-Ubuntu-124.04.1
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8426/1/testReport/
Max. process+thread count	632 (vs. ulimit of 10000)
modules	C: hadoop-tools/hadoop-aws U: hadoop-tools/hadoop-aws
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8426/1/console
versions	git=2.43.0 maven=3.9.11 spotbugs=4.9.7
Powered by	Apache Yetus 0.14.1 https://yetus.apache.org

This message was automatically generated.

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 32s		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 appears to include 1 new or modified test files.
			_ trunk Compile Tests _
+1 💚	mvninstall	41m 27s		trunk passed
+1 💚	compile	1m 7s		trunk passed with JDK Ubuntu-21.0.10+7-Ubuntu-124.04
+1 💚	compile	1m 9s		trunk passed with JDK Ubuntu-17.0.18+8-Ubuntu-124.04.1
+1 💚	checkstyle	1m 2s		trunk passed
+1 💚	mvnsite	1m 14s		trunk passed
+1 💚	javadoc	1m 5s		trunk passed with JDK Ubuntu-21.0.10+7-Ubuntu-124.04
+1 💚	javadoc	1m 1s		trunk passed with JDK Ubuntu-17.0.18+8-Ubuntu-124.04.1
+1 💚	spotbugs	1m 44s		trunk passed
+1 💚	shadedclient	28m 46s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 42s		the patch passed
+1 💚	compile	0m 38s		the patch passed with JDK Ubuntu-21.0.10+7-Ubuntu-124.04
+1 💚	javac	0m 38s		the patch passed
+1 💚	compile	0m 38s		the patch passed with JDK Ubuntu-17.0.18+8-Ubuntu-124.04.1
+1 💚	javac	0m 38s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 28s		the patch passed
+1 💚	mvnsite	0m 42s		the patch passed
+1 💚	javadoc	0m 31s		the patch passed with JDK Ubuntu-21.0.10+7-Ubuntu-124.04
+1 💚	javadoc	0m 31s		the patch passed with JDK Ubuntu-17.0.18+8-Ubuntu-124.04.1
+1 💚	spotbugs	1m 21s		the patch passed
+1 💚	shadedclient	27m 37s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	3m 23s		hadoop-aws in the patch passed.
+1 💚	asflicense	0m 36s		The patch does not generate ASF License warnings.
		117m 51s

Subsystem	Report/Notes
Docker	ClientAPI=1.54 ServerAPI=1.54 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8426/2/artifact/out/Dockerfile
GITHUB PR	#8426
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 10e36e2ee5a9 5.15.0-164-generic #174-Ubuntu SMP Fri Nov 14 20:25:16 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / beb077b
Default Java	Ubuntu-17.0.18+8-Ubuntu-124.04.1
Multi-JDK versions	/usr/lib/jvm/java-21-openjdk-amd64:Ubuntu-21.0.10+7-Ubuntu-124.04 /usr/lib/jvm/java-17-openjdk-amd64:Ubuntu-17.0.18+8-Ubuntu-124.04.1
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8426/2/testReport/
Max. process+thread count	610 (vs. ulimit of 10000)
modules	C: hadoop-tools/hadoop-aws U: hadoop-tools/hadoop-aws
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8426/2/console
versions	git=2.43.0 maven=3.9.11 spotbugs=4.9.7
Powered by	Apache Yetus 0.14.1 https://yetus.apache.org

This message was automatically generated.

[ajfabbri]

👋 Thanks for the PR! I've been meaning to help test and review this but haven't had time to get to it. Will try to take a look next week.