HADOOP-18806. Document missing property (ipc.server.read.threadpool.size) in core-default.xml

[eubnara]

Description of PR

I think ipc.server.read.threadpool.size is quite important configuration tuning point for scalability. But there is no mention about it in core-default.xml.
There are some articles about hadoop tuning configuration with it. (e.g. https://support.huawei.com/enterprise/en/knowledge/EKB1100015760)

How was this patch tested?

It is just changed documentation.

For code changes:

• Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?

[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 🆗	xmllint	0m 0s		xmllint 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 _
+1 💚	mvninstall	50m 30s		trunk passed
+1 💚	compile	18m 53s		trunk passed with JDK Ubuntu-11.0.19+7-post-Ubuntu-0ubuntu120.04.1
+1 💚	compile	17m 2s		trunk passed with JDK Private Build-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09
+1 💚	mvnsite	1m 42s		trunk passed
+1 💚	javadoc	1m 14s		trunk passed with JDK Ubuntu-11.0.19+7-post-Ubuntu-0ubuntu120.04.1
+1 💚	javadoc	0m 49s		trunk passed with JDK Private Build-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09
+1 💚	shadedclient	129m 23s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 56s		the patch passed
+1 💚	compile	17m 52s		the patch passed with JDK Ubuntu-11.0.19+7-post-Ubuntu-0ubuntu120.04.1
+1 💚	javac	17m 52s		the patch passed
+1 💚	compile	17m 8s		the patch passed with JDK Private Build-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09
+1 💚	javac	17m 8s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	1m 37s		the patch passed
+1 💚	javadoc	1m 9s		the patch passed with JDK Ubuntu-11.0.19+7-post-Ubuntu-0ubuntu120.04.1
+1 💚	javadoc	0m 50s		the patch passed with JDK Private Build-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09
+1 💚	shadedclient	44m 24s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	18m 48s		hadoop-common in the patch passed.
+1 💚	asflicense	0m 59s		The patch does not generate ASF License warnings.
		234m 35s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5844/1/artifact/out/Dockerfile
GITHUB PR	#5844
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient codespell detsecrets xmllint
uname	Linux 1dc32b454f2c 4.15.0-212-generic #223-Ubuntu SMP Tue May 23 13:09:22 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / c6b67a0
Default Java	Private Build-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.19+7-post-Ubuntu-0ubuntu120.04.1 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_362-8u372-gaus1-0ubuntu120.04-b09
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5844/1/testReport/
Max. process+thread count	1242 (vs. ulimit of 5500)
modules	C: hadoop-common-project/hadoop-common U: hadoop-common-project/hadoop-common
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-5844/1/console
versions	git=2.25.1 maven=3.6.3
Powered by	Apache Yetus 0.14.0 https://yetus.apache.org

This message was automatically generated.

[slfan1989]

LGTM

[ayushtkn]

how many configs are missing in core-default? I think we should add them all in one go

[YuanbenWang]

how many configs are missing in core-default? I think we should add them all in one go

Hello, @ayushtkn I am willing to follow up on this issue.

[github-actions]

We're closing this stale PR because it has been open for 100 days with no activity. This isn't a judgement on the merit of the PR in any way. It's just a way of keeping the PR queue manageable.
If you feel like this was a mistake, or you would like to continue working on it, please feel free to re-open it and ask for a committer to remove the stale tag and review again.
Thanks all for your contribution.

[eubnara]

I think this is resolved on HADOOP-18810 (1e3e246).