HADOOP-18415. Replace Sets.newHashSet() in hadoop-tools

[Samrat002]

Description of PR

HADOOP-18415

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]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 39s		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 0s		The patch appears to include 5 new or modified test files.
			_ trunk Compile Tests _
+0 🆗	mvndep	15m 43s		Maven dependency ordering for branch
+1 💚	mvninstall	27m 48s		trunk passed
+1 💚	compile	3m 34s		trunk passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	compile	2m 35s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	checkstyle	0m 56s		trunk passed
+1 💚	mvnsite	2m 4s		trunk passed
+1 💚	javadoc	1m 37s		trunk passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javadoc	1m 40s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	3m 2s		trunk passed
+1 💚	shadedclient	21m 18s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 30s		Maven dependency ordering for patch
+1 💚	mvninstall	1m 33s		the patch passed
+1 💚	compile	3m 27s		the patch passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javac	3m 27s		the patch passed
+1 💚	compile	2m 24s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	javac	2m 24s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 41s		the patch passed
+1 💚	mvnsite	1m 44s		the patch passed
+1 💚	javadoc	1m 15s		the patch passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javadoc	1m 21s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	3m 18s		the patch passed
+1 💚	shadedclient	21m 33s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	24m 37s		hadoop-distcp in the patch passed.
+1 💚	unit	0m 34s		hadoop-dynamometer-infra in the patch passed.
+1 💚	unit	2m 52s		hadoop-aws in the patch passed.
+1 💚	asflicense	0m 50s		The patch does not generate ASF License warnings.
		149m 47s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4805/1/artifact/out/Dockerfile
GITHUB PR	#4805
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 2a7bd08b6626 4.15.0-191-generic #202-Ubuntu SMP Thu Aug 4 01:49:29 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 1cdc5d3
Default Java	Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4805/1/testReport/
Max. process+thread count	728 (vs. ulimit of 5500)
modules	C: hadoop-tools/hadoop-distcp hadoop-tools/hadoop-dynamometer/hadoop-dynamometer-infra hadoop-tools/hadoop-aws U: hadoop-tools
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4805/1/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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[dannycjones]

+1 (non-binding), looks good to me

Thanks for breaking the PRs down by module, helps with reviewing.

[github-actions]

We're closing this stale PR because it has been open for 100 days with no activity. This isn't a judgement on the merit of the PR in any way. It's just a way of keeping the PR queue manageable.
If you feel like this was a mistake, or you would like to continue working on it, please feel free to re-open it and ask for a committer to remove the stale tag and review again.
Thanks all for your contribution.