YARN-11916. FileSystemTimelineReaderImpl vulnerable to race conditions (#8164)

[steveloughran]

Description of PR

backport to branch-3.4; needed to add the original junit to the test classpath

How was this patch tested?

running the modified test

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?

AI Tooling

If an AI tool was used:

• The PR includes the phrase "Contains content generated by "
  where is the name of the AI tool used.
• My use of AI contributions follows the ASF legal policy
  https://www.apache.org/legal/generative-tooling.html

[steveloughran]

This is a backport; if yetus is happy I will merge

[cnauroth]

+1 Thanks Steve.

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	19m 37s		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.
+0 🆗	xmllint	0m 0s		xmllint was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	test4tests	0m 0s		The patch appears to include 3 new or modified test files.
			_ branch-3.4 Compile Tests _
+0 🆗	mvndep	2m 44s		Maven dependency ordering for branch
+1 💚	mvninstall	35m 39s		branch-3.4 passed
+1 💚	compile	7m 31s		branch-3.4 passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚	compile	6m 46s		branch-3.4 passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚	checkstyle	1m 52s		branch-3.4 passed
+1 💚	mvnsite	1m 29s		branch-3.4 passed
+1 💚	javadoc	1m 29s		branch-3.4 passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚	javadoc	1m 21s		branch-3.4 passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚	spotbugs	2m 6s		branch-3.4 passed
+1 💚	shadedclient	32m 45s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 33s		Maven dependency ordering for patch
+1 💚	mvninstall	0m 43s		the patch passed
+1 💚	compile	6m 39s		the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
+1 💚	javac	6m 39s		the patch passed
+1 💚	compile	6m 46s		the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09
+1 💚	javac	6m 45s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
-0 ⚠️	checkstyle	1m 46s	/results-checkstyle-hadoop-yarn-project_hadoop-yarn.txt	hadoop-yarn-project/hadoop-yarn: The patch generated 11 new + 1 unchanged - 0 fixed = 12 total (was 1)
+1 💚	mvnsite	1m 19s		the patch passed
+1 💚	javadoc	0m 38s		hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-timelineservice-jdkUbuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04 generated 0 new + 2 unchanged - 3 fixed = 2 total (was 5)
+1 💚	javadoc	0m 39s		hadoop-yarn-client in the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04.
+1 💚	javadoc	0m 35s		hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-timelineservice-jdkPrivateBuild-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09 with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09 generated 0 new + 2 unchanged - 3 fixed = 2 total (was 5)
+1 💚	javadoc	0m 37s		hadoop-yarn-client in the patch passed with JDK Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-b09.
+1 💚	spotbugs	2m 13s		the patch passed
+1 💚	shadedclient	32m 27s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	1m 54s		hadoop-yarn-server-timelineservice in the patch passed.
+1 💚	unit	28m 14s		hadoop-yarn-client in the patch passed.
+1 💚	asflicense	1m 3s		The patch does not generate ASF License warnings.
		204m 55s

Subsystem	Report/Notes
Docker	ClientAPI=1.52 ServerAPI=1.52 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8170/1/artifact/out/Dockerfile
GITHUB PR	#8170
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient codespell detsecrets xmllint spotbugs checkstyle
uname	Linux 197b3dea5239 5.15.0-164-generic #174-Ubuntu SMP Fri Nov 14 20:25:16 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	branch-3.4 / d9e5bfd
Default Java	Private Build-1.8.0_452-8u452-gaus1-0ubuntu120.04-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-gaus1-0ubuntu120.04-b09
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8170/1/testReport/
Max. process+thread count	575 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-timelineservice hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client U: hadoop-yarn-project/hadoop-yarn
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8170/1/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.