HDFS-17943. Fix malformed error message for negative dfs.domain.socket.disable.interval.seconds

[namest504]

Description of PR

This PR fixes HDFS-17943.

When dfs.domain.socket.disable.interval.seconds is set to a negative value, the client fails with a malformed error message — a space is missing between the configuration key and the rest of the message:

java.lang.IllegalArgumentException: dfs.domain.socket.disable.interval.secondscan't be negative.

This change adds the missing space in the Preconditions.checkArgument message in DfsClientConf.ShortCircuitConf, so the message now reads:

dfs.domain.socket.disable.interval.seconds can't be negative.

How was this patch tested?

The change only touches a string literal in an error message. It was verified by setting the config to -1 and checking the corrected IllegalArgumentException message. A dedicated unit test was initially included but removed per review feedback, as it is not needed for this trivial fix.

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

Contains content generated by Claude Code.

• 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
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[hadoop-yetus]

🎊 +1 overall

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+1 💚	test4tests	0m 0s		The patch appears to include 1 new or modified test files.
			_ trunk Compile Tests _
+1 💚	mvninstall	46m 46s		trunk passed
+1 💚	compile	1m 16s		trunk passed with JDK Ubuntu-21.0.11+10-1-24.04.2-Ubuntu
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+1 💚	shadedclient	36m 56s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 53s		the patch passed
+1 💚	compile	0m 49s		the patch passed with JDK Ubuntu-21.0.11+10-1-24.04.2-Ubuntu
+1 💚	javac	0m 49s		the patch passed
+1 💚	compile	0m 51s		the patch passed with JDK Ubuntu-17.0.19+10-1-24.04.2-Ubuntu
+1 💚	javac	0m 51s		the patch passed
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+1 💚	javadoc	0m 36s		the patch passed with JDK Ubuntu-17.0.19+10-1-24.04.2-Ubuntu
+1 💚	spotbugs	3m 37s		the patch passed
+1 💚	shadedclient	36m 18s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	2m 39s		hadoop-hdfs-client in the patch passed.
+1 💚	asflicense	0m 36s		The patch does not generate ASF License warnings.
		142m 39s

Subsystem	Report/Notes
Docker	ClientAPI=1.55 ServerAPI=1.55 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8603/1/artifact/out/Dockerfile
GITHUB PR	#8603
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Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8603/1/testReport/
Max. process+thread count	571 (vs. ulimit of 10000)
modules	C: hadoop-hdfs-project/hadoop-hdfs-client U: hadoop-hdfs-project/hadoop-hdfs-client
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8603/1/console
versions	git=2.43.0 maven=3.9.15 spotbugs=4.9.7
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[ayushtkn]

LGTM

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 22s		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	26m 24s		trunk passed
+1 💚	compile	0m 47s		trunk passed with JDK Ubuntu-21.0.11+10-1-24.04.2-Ubuntu
+1 💚	compile	0m 47s		trunk passed with JDK Ubuntu-17.0.19+10-1-24.04.2-Ubuntu
+1 💚	checkstyle	0m 38s		trunk passed
+1 💚	mvnsite	0m 51s		trunk passed
+1 💚	javadoc	0m 46s		trunk passed with JDK Ubuntu-21.0.11+10-1-24.04.2-Ubuntu
+1 💚	javadoc	0m 43s		trunk passed with JDK Ubuntu-17.0.19+10-1-24.04.2-Ubuntu
+1 💚	spotbugs	2m 6s		trunk passed
+1 💚	shadedclient	17m 10s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 33s		the patch passed
+1 💚	compile	0m 27s		the patch passed with JDK Ubuntu-21.0.11+10-1-24.04.2-Ubuntu
+1 💚	javac	0m 27s		the patch passed
+1 💚	compile	0m 29s		the patch passed with JDK Ubuntu-17.0.19+10-1-24.04.2-Ubuntu
+1 💚	javac	0m 29s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 15s		the patch passed
+1 💚	mvnsite	0m 29s		the patch passed
+1 💚	javadoc	0m 22s		the patch passed with JDK Ubuntu-21.0.11+10-1-24.04.2-Ubuntu
+1 💚	javadoc	0m 24s		the patch passed with JDK Ubuntu-17.0.19+10-1-24.04.2-Ubuntu
+1 💚	spotbugs	1m 49s		the patch passed
+1 💚	shadedclient	16m 15s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	2m 0s		hadoop-hdfs-client in the patch passed.
+1 💚	asflicense	0m 23s		The patch does not generate ASF License warnings.
		73m 39s

Subsystem	Report/Notes
Docker	ClientAPI=1.55 ServerAPI=1.55 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8603/2/artifact/out/Dockerfile
GITHUB PR	#8603
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 26a604a4c2af 5.15.0-181-generic #191-Ubuntu SMP Fri May 22 19:09:02 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / fa1423c
Default Java	Ubuntu-17.0.19+10-1-24.04.2-Ubuntu
Multi-JDK versions	/usr/lib/jvm/java-21-openjdk-amd64:Ubuntu-21.0.11+10-1-24.04.2-Ubuntu /usr/lib/jvm/java-17-openjdk-amd64:Ubuntu-17.0.19+10-1-24.04.2-Ubuntu
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8603/2/testReport/
Max. process+thread count	641 (vs. ulimit of 10000)
modules	C: hadoop-hdfs-project/hadoop-hdfs-client U: hadoop-hdfs-project/hadoop-hdfs-client
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8603/2/console
versions	git=2.43.0 maven=3.9.15 spotbugs=4.9.7
Powered by	Apache Yetus 0.14.1 https://yetus.apache.org

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[ayushtkn]

do you have a jira id? So, I can merge and assign the ticket to you? if so can you assign the jira to your name or drop your jira id here & I will do that

[namest504]

Thanks for the review! I don't have a Jira account yet — I requested one via ASF self-serve on July 14 (requested username: namest504) and it's still pending approval.