HDFS-17461. Fix spotbugs in PeerCache#getInternal.

[sadanand48]

Description of PR

Backport HDFS-17461 to branch 3.4 , this is a dependency blocking yetus green build in #7083

How was this patch tested?

spotbug fix tested by CI

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	6m 59s		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 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.
			_ branch-3.4 Compile Tests _
+1 💚	mvninstall	31m 18s		branch-3.4 passed
+1 💚	compile	0m 34s		branch-3.4 passed with JDK Ubuntu-11.0.24+8-post-Ubuntu-1ubuntu320.04
+1 💚	compile	0m 31s		branch-3.4 passed with JDK Private Build-1.8.0_422-8u422-b05-1~20.04-b05
+1 💚	checkstyle	0m 21s		branch-3.4 passed
+1 💚	mvnsite	0m 36s		branch-3.4 passed
+1 💚	javadoc	0m 33s		branch-3.4 passed with JDK Ubuntu-11.0.24+8-post-Ubuntu-1ubuntu320.04
+1 💚	javadoc	0m 28s		branch-3.4 passed with JDK Private Build-1.8.0_422-8u422-b05-1~20.04-b05
-1 ❌	spotbugs	1m 29s	/branch-spotbugs-hadoop-hdfs-project_hadoop-hdfs-client-warnings.html	hadoop-hdfs-project/hadoop-hdfs-client in branch-3.4 has 1 extant spotbugs warnings.
+1 💚	shadedclient	20m 44s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 28s		the patch passed
+1 💚	compile	0m 30s		the patch passed with JDK Ubuntu-11.0.24+8-post-Ubuntu-1ubuntu320.04
+1 💚	javac	0m 30s		the patch passed
+1 💚	compile	0m 26s		the patch passed with JDK Private Build-1.8.0_422-8u422-b05-1~20.04-b05
+1 💚	javac	0m 26s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 13s		the patch passed
+1 💚	mvnsite	0m 29s		the patch passed
+1 💚	javadoc	0m 23s		the patch passed with JDK Ubuntu-11.0.24+8-post-Ubuntu-1ubuntu320.04
+1 💚	javadoc	0m 21s		the patch passed with JDK Private Build-1.8.0_422-8u422-b05-1~20.04-b05
+1 💚	spotbugs	1m 21s		hadoop-hdfs-project/hadoop-hdfs-client generated 0 new + 0 unchanged - 1 fixed = 0 total (was 1)
+1 💚	shadedclient	20m 38s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	1m 49s		hadoop-hdfs-client in the patch passed.
+1 💚	asflicense	0m 25s		The patch does not generate ASF License warnings.
		90m 33s

Subsystem	Report/Notes
Docker	ClientAPI=1.47 ServerAPI=1.47 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7092/1/artifact/out/Dockerfile
GITHUB PR	#7092
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 1bc3c7b93421 5.15.0-116-generic #126-Ubuntu SMP Mon Jul 1 10:14:24 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	branch-3.4 / b8f482a
Default Java	Private Build-1.8.0_422-8u422-b05-1~20.04-b05
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.24+8-post-Ubuntu-1ubuntu320.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_422-8u422-b05-1~20.04-b05
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7092/1/testReport/
Max. process+thread count	559 (vs. ulimit of 5500)
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-7092/1/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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