HDFS-17752. Host2DatanodeMap will not update when re-register a node …

[liuwenjing17]

…with a different hostname

Description of PR

When same Dn restart with a different hostname, host2DatanodeMap needs to be updated accordingly.

How was this patch tested?

org.apache.hadoop.hdfs.server.blockmanagement.TestDatanodeManager#testHost2NodeMapCorrectAfterReregister

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?

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 20s		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	22m 57s		trunk passed
+1 💚	compile	0m 46s		trunk passed with JDK Ubuntu-11.0.26+4-post-Ubuntu-1ubuntu120.04
+1 💚	compile	0m 39s		trunk passed with JDK Private Build-1.8.0_442-8u442-b06us1-0ubuntu120.04-b06
+1 💚	checkstyle	0m 35s		trunk passed
+1 💚	mvnsite	0m 43s		trunk passed
+1 💚	javadoc	0m 43s		trunk passed with JDK Ubuntu-11.0.26+4-post-Ubuntu-1ubuntu120.04
+1 💚	javadoc	1m 1s		trunk passed with JDK Private Build-1.8.0_442-8u442-b06us1-0ubuntu120.04-b06
+1 💚	spotbugs	1m 40s		trunk passed
+1 💚	shadedclient	20m 56s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 35s		the patch passed
+1 💚	compile	0m 39s		the patch passed with JDK Ubuntu-11.0.26+4-post-Ubuntu-1ubuntu120.04
+1 💚	javac	0m 39s		the patch passed
+1 💚	compile	0m 32s		the patch passed with JDK Private Build-1.8.0_442-8u442-b06us1-0ubuntu120.04-b06
+1 💚	javac	0m 32s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 29s		the patch passed
+1 💚	mvnsite	0m 38s		the patch passed
-1 ❌	javadoc	0m 32s	/results-javadoc-javadoc-hadoop-hdfs-project_hadoop-hdfs-jdkUbuntu-11.0.26+4-post-Ubuntu-1ubuntu120.04.txt	hadoop-hdfs-project_hadoop-hdfs-jdkUbuntu-11.0.26+4-post-Ubuntu-1ubuntu120.04 with JDK Ubuntu-11.0.26+4-post-Ubuntu-1ubuntu120.04 generated 1 new + 2954 unchanged - 0 fixed = 2955 total (was 2954)
+1 💚	javadoc	1m 0s		the patch passed with JDK Private Build-1.8.0_442-8u442-b06us1-0ubuntu120.04-b06
+1 💚	spotbugs	1m 42s		the patch passed
+1 💚	shadedclient	20m 53s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	0m 57s		hadoop-hdfs in the patch passed.
+1 💚	asflicense	0m 26s		The patch does not generate ASF License warnings.
		78m 18s

Subsystem	Report/Notes
Docker	ClientAPI=1.48 ServerAPI=1.48 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7468/1/artifact/out/Dockerfile
GITHUB PR	#7468
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux f0b42a059e5a 5.15.0-130-generic #140-Ubuntu SMP Wed Dec 18 17:59:53 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 2bd72b9
Default Java	Private Build-1.8.0_442-8u442-b06us1-0ubuntu120.04-b06
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.26+4-post-Ubuntu-1ubuntu120.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_442-8u442-b06us1-0ubuntu120.04-b06
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7468/1/testReport/
Max. process+thread count	545 (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-7468/1/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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