adding ARC Managed Identity support to hadoop-azure ABFS

[sijjay]

Description of PR

How was this patch tested?

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]

:broken_heart: -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 :ok:	reexec	18m 33s		Docker mode activated.
			_ Prechecks _
+1 :green_heart:	dupname	0m 0s		No case conflicting files found.
+0 :ok:	codespell	0m 0s		codespell was not available.
+0 :ok:	detsecrets	0m 0s		detect-secrets was not available.
+1 :green_heart:	@author	0m 0s		The patch does not contain any @author tags.
+1 :green_heart:	test4tests	0m 0s		The patch appears to include 1 new or modified test files.
			_ branch-3.4.1 Compile Tests _
+1 :green_heart:	mvninstall	50m 39s		branch-3.4.1 passed
+1 :green_heart:	compile	0m 40s		branch-3.4.1 passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 :green_heart:	compile	0m 35s		branch-3.4.1 passed with JDK Private Build-1.8.0_452-8u452-ga~us1-0ubuntu1~20.04-b09
+1 :green_heart:	checkstyle	0m 32s		branch-3.4.1 passed
+1 :green_heart:	mvnsite	0m 41s		branch-3.4.1 passed
+1 :green_heart:	javadoc	0m 39s		branch-3.4.1 passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 :green_heart:	javadoc	0m 33s		branch-3.4.1 passed with JDK Private Build-1.8.0_452-8u452-ga~us1-0ubuntu1~20.04-b09
+1 :green_heart:	spotbugs	1m 9s		branch-3.4.1 passed
+1 :green_heart:	shadedclient	37m 36s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 :green_heart:	mvninstall	0m 28s		the patch passed
+1 :green_heart:	compile	0m 31s		the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 :green_heart:	javac	0m 31s		the patch passed
+1 :green_heart:	compile	0m 26s		the patch passed with JDK Private Build-1.8.0_452-8u452-ga~us1-0ubuntu1~20.04-b09
+1 :green_heart:	javac	0m 26s		the patch passed
+1 :green_heart:	blanks	0m 0s		The patch has no blanks issues.
-0 :warning:	checkstyle	0m 21s	/results-checkstyle-hadoop-tools_hadoop-azure.txt	hadoop-tools/hadoop-azure: The patch generated 2 new + 2 unchanged - 0 fixed = 4 total (was 2)
+1 :green_heart:	mvnsite	0m 30s		the patch passed
-1 :x:	javadoc	0m 26s	/results-javadoc-javadoc-hadoop-tools_hadoop-azure-jdkUbuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04.txt	hadoop-tools_hadoop-azure-jdkUbuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 generated 3 new + 15 unchanged - 0 fixed = 18 total (was 15)
-1 :x:	javadoc	0m 25s	/results-javadoc-javadoc-hadoop-tools_hadoop-azure-jdkPrivateBuild-1.8.0_452-8u452-ga~us1-0ubuntu1~20.04-b09.txt	hadoop-tools_hadoop-azure-jdkPrivateBuild-1.8.0_452-8u452-ga~us1-0ubuntu1~20.04-b09 with JDK Private Build-1.8.0_452-8u452-ga~us1-0ubuntu1~20.04-b09 generated 3 new + 15 unchanged - 0 fixed = 18 total (was 15)
-1 :x:	spotbugs	1m 7s	/new-spotbugs-hadoop-tools_hadoop-azure.html	hadoop-tools/hadoop-azure generated 2 new + 0 unchanged - 0 fixed = 2 total (was 0)
+1 :green_heart:	shadedclient	37m 45s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 :green_heart:	unit	2m 16s		hadoop-azure in the patch passed.
+1 :green_heart:	asflicense	0m 37s		The patch does not generate ASF License warnings.
		158m 0s

Reason	Tests
SpotBugs	module:hadoop-tools/hadoop-azure
	Found reliance on default encoding in org.apache.hadoop.fs.azurebfs.oauth2.AzureADAuthenticator.getTokenSingleCall(String, String, Hashtable, String, boolean, boolean):in org.apache.hadoop.fs.azurebfs.oauth2.AzureADAuthenticator.getTokenSingleCall(String, String, Hashtable, String, boolean, boolean): new java.io.FileReader(String) At AzureADAuthenticator.java:[line 492]
	Immediate dereference of the result of readLine() in org.apache.hadoop.fs.azurebfs.oauth2.AzureADAuthenticator.getTokenSingleCall(String, String, Hashtable, String, boolean, boolean) At AzureADAuthenticator.java:of readLine() in org.apache.hadoop.fs.azurebfs.oauth2.AzureADAuthenticator.getTokenSingleCall(String, String, Hashtable, String, boolean, boolean) At AzureADAuthenticator.java:[line 493]

Subsystem	Report/Notes
Docker	ClientAPI=1.51 ServerAPI=1.51 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8027/1/artifact/out/Dockerfile
GITHUB PR	https://github.com/apache/hadoop/pull/8027
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux b4cd632ee34d 5.15.0-151-generic #161-Ubuntu SMP Tue Jul 22 14:25:40 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	branch-3.4.1 / 3a5f54192031dfb5acf38fb473c0e942a4603e8b
Default Java	Private Build-1.8.0_452-8u452-ga~us1-0ubuntu1~20.04-b09
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_452-8u452-ga~us1-0ubuntu1~20.04-b09
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8027/1/testReport/
Max. process+thread count	527 (vs. ulimit of 5500)
modules	C: hadoop-tools/hadoop-azure U: hadoop-tools/hadoop-azure
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8027/1/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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