HDFS-16635.Fixed javadoc error in Java 11

[hotcodemacha]

Description of PR

Fixed javadoc error in Java 11

• JIRA: HDFS-16635

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

[slfan1989]

@ashutoshcipher This seems to coincide with the pr I submitted(#4423), I will close my pr and wait for you to fix it, thanks！According to the test results, repairing this can prevent the java doc from reporting errors.

[hotcodemacha]

@ashutoshcipher This seems to coincide with the pr I submitted(#4423), I will close my pr and wait for you to fix it, thanks！According to the test results, repairing this can prevent the java doc from reporting errors.

Thanks @slfan1989

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 52s		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.
			_ trunk Compile Tests _
+1 💚	mvninstall	41m 3s		trunk passed
+1 💚	compile	1m 47s		trunk passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	compile	1m 36s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	checkstyle	1m 20s		trunk passed
+1 💚	mvnsite	1m 45s		trunk passed
-1 ❌	javadoc	1m 21s	/branch-javadoc-hadoop-hdfs-project_hadoop-hdfs-jdkPrivateBuild-11.0.15+10-Ubuntu-0ubuntu0.20.04.1.txt	hadoop-hdfs in trunk failed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1.
+1 💚	javadoc	1m 42s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	3m 59s		trunk passed
+1 💚	shadedclient	26m 30s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	1m 27s		the patch passed
+1 💚	compile	1m 32s		the patch passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javac	1m 32s		the patch passed
+1 💚	compile	1m 21s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	javac	1m 21s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	1m 0s		the patch passed
+1 💚	mvnsite	1m 27s		the patch passed
+1 💚	javadoc	0m 59s		hadoop-hdfs-project_hadoop-hdfs-jdkPrivateBuild-11.0.15+10-Ubuntu-0ubuntu0.20.04.1 with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1 generated 0 new + 99 unchanged - 1 fixed = 99 total (was 100)
+1 💚	javadoc	1m 31s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	3m 53s		the patch passed
+1 💚	shadedclient	25m 48s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	371m 8s		hadoop-hdfs in the patch passed.
+1 💚	asflicense	1m 2s		The patch does not generate ASF License warnings.
		490m 8s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4451/1/artifact/out/Dockerfile
GITHUB PR	#4451
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 239d412500bf 4.15.0-175-generic #184-Ubuntu SMP Thu Mar 24 17:48:36 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 4948f0e
Default Java	Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4451/1/testReport/
Max. process+thread count	1995 (vs. ulimit of 5500)
modules	C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4451/1/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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[PrabhuJoseph]

Thanks @ashutoshcipher for the patch. Looks good to me.