HADOOP-19555. Fix testRenameFileWithFullQualifiedPath on Windows

[GauthamBanasandra]

Description of PR

The Apache Commons Net FTP library is used for FTPFileSystem. In TestFTPFileSystem#testRenameFileWithFullQualifiedPath(), the FS operations (such as touch and rename) are made using absolute paths. However, the library expects relative paths.
This caused FTPFileSystem#getFileStatus() to throw FileNotFoundException since the library was trying to look for the absolute path under which the FileSystem was mounted.

This worked fine on Linux as it just appended the absolute path under the FileSystem's mount path -

However, this fails on Windows since suffixing the absolute path under the FileSystem's mount path doesn't yield a valid path due to the drive letter in the absolute path.

Consider the following illustration -

On Linux

path1 => /mnt/d/a/b
path2 => /mnt/d/x/y
path1 + path2 yields a valid path => /mnt/d/a/b/mnt/d/x/y

On Windows

path1 => C:\a\b
path2 => C:\x\y
path1 + path2 doesn't yield a valid path => C:\a\b\C:\x\y

So, to fix this, we need to treat the FS operations as purely relative.

How was this patch tested?

• Ran the unit tests locally.
• Jenkins CI validation.

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 31s		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	35m 40s		trunk passed
+1 💚	compile	15m 45s		trunk passed with JDK Ubuntu-11.0.26+4-post-Ubuntu-1ubuntu120.04
+1 💚	compile	13m 36s		trunk passed with JDK Private Build-1.8.0_442-8u442-b06us1-0ubuntu120.04-b06
+1 💚	checkstyle	1m 17s		trunk passed
+1 💚	mvnsite	1m 36s		trunk passed
+1 💚	javadoc	1m 16s		trunk passed with JDK Ubuntu-11.0.26+4-post-Ubuntu-1ubuntu120.04
+1 💚	javadoc	0m 54s		trunk passed with JDK Private Build-1.8.0_442-8u442-b06us1-0ubuntu120.04-b06
+1 💚	spotbugs	2m 29s		trunk passed
+1 💚	shadedclient	36m 15s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 57s		the patch passed
+1 💚	compile	14m 45s		the patch passed with JDK Ubuntu-11.0.26+4-post-Ubuntu-1ubuntu120.04
+1 💚	javac	14m 45s		the patch passed
+1 💚	compile	13m 36s		the patch passed with JDK Private Build-1.8.0_442-8u442-b06us1-0ubuntu120.04-b06
+1 💚	javac	13m 36s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	1m 13s		the patch passed
+1 💚	mvnsite	1m 36s		the patch passed
+1 💚	javadoc	1m 10s		the patch passed with JDK Ubuntu-11.0.26+4-post-Ubuntu-1ubuntu120.04
+1 💚	javadoc	0m 54s		the patch passed with JDK Private Build-1.8.0_442-8u442-b06us1-0ubuntu120.04-b06
+1 💚	spotbugs	2m 42s		the patch passed
+1 💚	shadedclient	36m 17s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	22m 56s		hadoop-common in the patch passed.
+1 💚	asflicense	1m 4s		The patch does not generate ASF License warnings.
		207m 22s

Subsystem	Report/Notes
Docker	ClientAPI=1.49 ServerAPI=1.49 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7654/1/artifact/out/Dockerfile
GITHUB PR	#7654
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux c1bf5de9a12a 5.15.0-136-generic #147-Ubuntu SMP Sat Mar 15 15:53:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 1292957
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-7654/1/testReport/
Max. process+thread count	1269 (vs. ulimit of 5500)
modules	C: hadoop-common-project/hadoop-common U: hadoop-common-project/hadoop-common
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7654/1/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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This message was automatically generated.

[GauthamBanasandra]

Started the CI run for Windows - https://ci-hadoop.apache.org/view/Hadoop/job/hadoop-qbt-trunk-java8-win10-x86_64/905/.

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 32s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 1s		codespell was not available.
+0 🆗	detsecrets	0m 1s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	test4tests	0m 1s		The patch appears to include 1 new or modified test files.
			_ trunk Compile Tests _
+1 💚	mvninstall	37m 19s		trunk passed
+1 💚	compile	15m 35s		trunk passed with JDK Ubuntu-11.0.26+4-post-Ubuntu-1ubuntu120.04
+1 💚	compile	13m 44s		trunk passed with JDK Private Build-1.8.0_442-8u442-b06us1-0ubuntu120.04-b06
+1 💚	checkstyle	1m 18s		trunk passed
+1 💚	mvnsite	1m 39s		trunk passed
+1 💚	javadoc	1m 15s		trunk passed with JDK Ubuntu-11.0.26+4-post-Ubuntu-1ubuntu120.04
+1 💚	javadoc	0m 54s		trunk passed with JDK Private Build-1.8.0_442-8u442-b06us1-0ubuntu120.04-b06
+1 💚	spotbugs	2m 34s		trunk passed
+1 💚	shadedclient	39m 0s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 56s		the patch passed
+1 💚	compile	14m 58s		the patch passed with JDK Ubuntu-11.0.26+4-post-Ubuntu-1ubuntu120.04
+1 💚	javac	14m 58s		the patch passed
+1 💚	compile	13m 49s		the patch passed with JDK Private Build-1.8.0_442-8u442-b06us1-0ubuntu120.04-b06
+1 💚	javac	13m 49s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	1m 13s		the patch passed
+1 💚	mvnsite	1m 36s		the patch passed
+1 💚	javadoc	1m 9s		the patch passed with JDK Ubuntu-11.0.26+4-post-Ubuntu-1ubuntu120.04
+1 💚	javadoc	0m 53s		the patch passed with JDK Private Build-1.8.0_442-8u442-b06us1-0ubuntu120.04-b06
+1 💚	spotbugs	2m 40s		the patch passed
+1 💚	shadedclient	36m 36s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	22m 59s		hadoop-common in the patch passed.
+1 💚	asflicense	1m 3s		The patch does not generate ASF License warnings.
		212m 32s

Subsystem	Report/Notes
Docker	ClientAPI=1.49 ServerAPI=1.49 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7654/2/artifact/out/Dockerfile
GITHUB PR	#7654
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 200fa9309927 5.15.0-136-generic #147-Ubuntu SMP Sat Mar 15 15:53:30 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / eba3e10
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-7654/2/testReport/
Max. process+thread count	1271 (vs. ulimit of 5500)
modules	C: hadoop-common-project/hadoop-common U: hadoop-common-project/hadoop-common
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7654/2/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
Powered by	Apache Yetus 0.14.0 https://yetus.apache.org

This message was automatically generated.

[GauthamBanasandra]

The Windows CI run has finished. The test has passed -

[INFO] Running org.apache.hadoop.fs.ftp.TestFTPFileSystem
[INFO] Tests run: 8, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 1.93 s - in org.apache.hadoop.fs.ftp.TestFTPFileSystem

Logs - archive.zip