HDFS-17927. Make TestDiskError.testShutdown use deterministic volume failure injection

[smengcl]

Description of PR

TestDiskError.testShutdown() currently drives DataNode shutdown by repeatedly creating files until dn.isDatanodeUp() becomes false. If shutdown does not happen promptly, the test can loop for a long time and generate excessive logs.

This change replaces the file-create loop with deterministic failure injection for both DataNode data dirs, then explicitly runs dn.checkDiskError() and waits boundedly for the DataNode to exit.

How was this patch tested?

• The test TestDiskError.testShutdown itself.

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?

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[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	6m 35s		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	27m 1s		trunk passed
+1 💚	compile	0m 59s		trunk passed with JDK Ubuntu-21.0.10+7-Ubuntu-124.04
+1 💚	compile	1m 1s		trunk passed with JDK Ubuntu-17.0.18+8-Ubuntu-124.04.1
+1 💚	checkstyle	0m 59s		trunk passed
+1 💚	mvnsite	1m 10s		trunk passed
+1 💚	javadoc	0m 58s		trunk passed with JDK Ubuntu-21.0.10+7-Ubuntu-124.04
+1 💚	javadoc	0m 56s		trunk passed with JDK Ubuntu-17.0.18+8-Ubuntu-124.04.1
+1 💚	spotbugs	2m 12s		trunk passed
+1 💚	shadedclient	17m 15s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 46s		the patch passed
+1 💚	compile	0m 39s		the patch passed with JDK Ubuntu-21.0.10+7-Ubuntu-124.04
+1 💚	javac	0m 39s		the patch passed
+1 💚	compile	0m 44s		the patch passed with JDK Ubuntu-17.0.18+8-Ubuntu-124.04.1
+1 💚	javac	0m 44s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
-0 ⚠️	checkstyle	0m 41s	/results-checkstyle-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs-project/hadoop-hdfs: The patch generated 1 new + 2 unchanged - 1 fixed = 3 total (was 3)
+1 💚	mvnsite	0m 46s		the patch passed
+1 💚	javadoc	0m 34s		the patch passed with JDK Ubuntu-21.0.10+7-Ubuntu-124.04
+1 💚	javadoc	0m 36s		the patch passed with JDK Ubuntu-17.0.18+8-Ubuntu-124.04.1
+1 💚	spotbugs	2m 1s		the patch passed
+1 💚	shadedclient	16m 52s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
-1 ❌	unit	185m 8s	/patch-unit-hadoop-hdfs-project_hadoop-hdfs.txt	hadoop-hdfs in the patch passed.
+1 💚	asflicense	0m 30s		The patch does not generate ASF License warnings.
		267m 59s

Reason	Tests
Failed junit tests	hadoop.hdfs.server.balancer.TestBalancerWithHANameNodes

Subsystem	Report/Notes
Docker	ClientAPI=1.54 ServerAPI=1.54 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8517/1/artifact/out/Dockerfile
GITHUB PR	#8517
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 13ab2fe8bf49 5.15.0-173-generic #183-Ubuntu SMP Fri Mar 6 13:29:34 UTC 2026 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / d6f2f1e
Default Java	Ubuntu-17.0.18+8-Ubuntu-124.04.1
Multi-JDK versions	/usr/lib/jvm/java-21-openjdk-amd64:Ubuntu-21.0.10+7-Ubuntu-124.04 /usr/lib/jvm/java-17-openjdk-amd64:Ubuntu-17.0.18+8-Ubuntu-124.04.1
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8517/1/testReport/
Max. process+thread count	4370 (vs. ulimit of 10000)
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-8517/1/console
versions	git=2.43.0 maven=3.9.15 spotbugs=4.9.7
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