HADOOP-19846: Increase ulimit nproc for Yetus.

[ajfabbri]

Description of PR

How was this patch tested?

We will monitor CI and see if this improves the flakiness.

For code changes:

• Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
• [ na] Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
• [ na] If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
• [ na] If applicable, have you updated the LICENSE, LICENSE-binary, NOTICE-binary files?

AI Tooling

If an AI tool was used:

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

[hadoop-yetus]

(!) A patch to the testing environment has been detected.
Re-executing against the patched versions to perform further tests.
The console is at https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8358/1/console in case of problems.

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	1m 2s		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.
+0 🆗	shelldocs	0m 0s		Shelldocs 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 _
+0 🆗	mvndep	2m 10s		Maven dependency ordering for branch
+1 💚	mvninstall	54m 9s		trunk passed
+1 💚	mvnsite	0m 0s		trunk passed
+1 💚	shadedclient	34m 43s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 32s		Maven dependency ordering for patch
+1 💚	mvninstall	0m 0s		the patch passed
+1 💚	blanks	0m 1s		The patch has no blanks issues.
+1 💚	mvnsite	0m 0s		the patch passed
-1 ❌	shellcheck	0m 2s	/results-shellcheck.txt	The patch generated 1 new + 3 unchanged - 0 fixed = 4 total (was 3)
+1 💚	shadedclient	33m 46s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	asflicense	0m 34s		The patch does not generate ASF License warnings.
		130m 11s

Subsystem	Report/Notes
Docker	ClientAPI=1.54 ServerAPI=1.54 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8358/1/artifact/out/Dockerfile
GITHUB PR	#8358
Optional Tests	dupname asflicense mvnsite unit codespell detsecrets shellcheck shelldocs
uname	Linux 8955621b8ecb 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 / b4ced42
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8358/1/testReport/
Max. process+thread count	590 (vs. ulimit of 10000)
modules	C: U:
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8358/1/console
versions	git=2.43.0 maven=3.9.11 shellcheck=0.9.0
Powered by	Apache Yetus 0.14.1 https://yetus.apache.org

This message was automatically generated.

[hadoop-yetus]

(!) A patch to the testing environment has been detected.
Re-executing against the patched versions to perform further tests.
The console is at https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8358/2/console in case of problems.

[hadoop-yetus]

💔 -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.
+0 🆗	shelldocs	0m 0s		Shelldocs 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 _
+0 🆗	mvndep	2m 3s		Maven dependency ordering for branch
+1 💚	mvninstall	50m 49s		trunk passed
+1 💚	mvnsite	0m 0s		trunk passed
+1 💚	shadedclient	33m 27s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 47s		Maven dependency ordering for patch
+1 💚	mvninstall	0m 0s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	0m 0s		the patch passed
+1 💚	shellcheck	0m 2s		No new issues.
+1 💚	shadedclient	32m 58s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	asflicense	0m 34s		The patch does not generate ASF License warnings.
		124m 32s

Subsystem	Report/Notes
Docker	ClientAPI=1.54 ServerAPI=1.54 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8358/2/artifact/out/Dockerfile
GITHUB PR	#8358
Optional Tests	dupname asflicense mvnsite unit codespell detsecrets shellcheck shelldocs
uname	Linux 64f0838beb3f 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 / 72a2865
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8358/2/testReport/
Max. process+thread count	586 (vs. ulimit of 10000)
modules	C: U:
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8358/2/console
versions	git=2.43.0 maven=3.9.11 shellcheck=0.9.0
Powered by	Apache Yetus 0.14.1 https://yetus.apache.org

This message was automatically generated.

[pan3793]

what's the default value if we don't set it explicitly?

[pan3793]

okay, I figured it out by looking at Yetus reports in other PRs, it's 5500 by default. double it makes sense

[ajfabbri]

Yep. Thanks for the review!