HDFS-15898. Test case TestOfflineImageViewer fails

[ferhui]

NOTICE

Please create an issue in ASF JIRA before opening a pull request,
and you need to set the title of the pull request which starts with
the corresponding JIRA issue number. (e.g. HADOOP-XXXXX. Fix a typo in YYY.)
For more details, please see https://cwiki.apache.org/confluence/display/HADOOP/How+To+Contribute

[aajisaka]

This patch fixed the tests in my local. Thank you @ferhui

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 54s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 1s		codespell 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	34m 41s		trunk passed
+1 💚	compile	1m 23s		trunk passed with JDK Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04
+1 💚	compile	1m 13s		trunk passed with JDK Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08
+1 💚	checkstyle	1m 1s		trunk passed
+1 💚	mvnsite	1m 21s		trunk passed
+1 💚	javadoc	0m 53s		trunk passed with JDK Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04
+1 💚	javadoc	1m 20s		trunk passed with JDK Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08
+1 💚	spotbugs	3m 19s		trunk passed
+1 💚	shadedclient	18m 56s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	1m 16s		the patch passed
+1 💚	compile	1m 14s		the patch passed with JDK Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04
+1 💚	javac	1m 14s		the patch passed
+1 💚	compile	1m 9s		the patch passed with JDK Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08
+1 💚	javac	1m 9s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 55s		the patch passed
+1 💚	mvnsite	1m 14s		the patch passed
+1 💚	javadoc	0m 45s		the patch passed with JDK Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04
+1 💚	javadoc	1m 16s		the patch passed with JDK Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08
+1 💚	spotbugs	3m 29s		the patch passed
+1 💚	shadedclient	19m 24s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
-1 ❌	unit	355m 2s	/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs in the patch passed.
+1 💚	asflicense	0m 35s		The patch does not generate ASF License warnings.
		448m 32s

Reason	Tests
Failed junit tests	hadoop.hdfs.server.datanode.TestBlockScanner
	hadoop.hdfs.server.namenode.ha.TestBootstrapStandby
	hadoop.hdfs.TestPersistBlocks
	hadoop.hdfs.server.namenode.ha.TestEditLogTailer
	hadoop.hdfs.TestDFSShell
	hadoop.hdfs.server.namenode.snapshot.TestNestedSnapshots
	hadoop.hdfs.server.datanode.TestIncrementalBrVariations
	hadoop.hdfs.server.datanode.fsdataset.impl.TestFsVolumeList
	hadoop.hdfs.server.namenode.TestDecommissioningStatusWithBackoffMonitor
	hadoop.hdfs.server.mover.TestMover
	hadoop.hdfs.server.datanode.TestDataNodeHotSwapVolumes
	hadoop.hdfs.server.namenode.TestDecommissioningStatus

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2779/1/artifact/out/Dockerfile
GITHUB PR	#2779
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell
uname	Linux 38d5848ba236 4.15.0-136-generic #140-Ubuntu SMP Thu Jan 28 05:20:47 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 631df69
Default Java	Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.10+9-Ubuntu-0ubuntu1.20.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_282-8u282-b08-0ubuntu1~20.04-b08
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-2779/1/testReport/
Max. process+thread count	2191 (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-2779/1/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
Powered by	Apache Yetus 0.14.0-SNAPSHOT https://yetus.apache.org

This message was automatically generated.

[ferhui]

@aajisaka Thanks for review!
Failed tests are unrelated, merged