YARN-11876. Fix AsyncDispatcher crash in TestAppManager #8014

slfan1989 · 2025-10-07T03:01:52Z

Description of PR

JIRA: YARN-11876. Fix AsyncDispatcher crash in TestAppManager.

After upgrading to JUnit 5, the ResourceManager module encounters a crash when running unit tests. Specifically, the failure occurs in the test case TestAppManager#testRMAppSubmitWithQueueChanged.
During application submission, the test changes the queue assignment, which triggers a SchedulerEvent that the AsyncDispatcher cannot handle.

As a result, the dispatcher thread throws an exception and terminates, causing the test JVM to exit abnormally with a SurefireBooterForkException.

Error Details

2025-10-08 07:56:46,833 ERROR [AsyncDispatcher event handler] event.AsyncDispatcher (MarkerIgnoringBase.java:error(159)) - Error in dispatcher thread
java.lang.Exception: No handler registered for class org.apache.hadoop.yarn.server.resourcemanager.scheduler.event.SchedulerEventType
    at org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:277)
    at org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:162)
    at java.lang.Thread.run(Thread.java:750)

This leads to Maven Surefire reporting a forked VM crash:

org.apache.maven.surefire.booter.SurefireBooterForkException: ExecutionException The forked VM terminated without properly saying goodbye. VM crash or System.exit called?
Process Exit Code: 255
Crashed tests: org.apache.hadoop.yarn.server.resourcemanager.TestAppManager

How was this patch tested?

CI.

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 · 2025-10-07T07:49:47Z

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	27m 7s		Docker mode activated.
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+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 11 new or modified test files.
			_ trunk Compile Tests _
-1 ❌	mvninstall	45m 44s	/branch-mvninstall-root.txt	root in trunk failed.
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+1 💚	shadedclient	36m 52s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 52s		the patch passed
+1 💚	compile	1m 0s		the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
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+1 💚	blanks	0m 0s		The patch has no blanks issues.
-0 ⚠️	checkstyle	0m 36s	/results-checkstyle-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt	hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager: The patch generated 8 new + 177 unchanged - 1 fixed = 185 total (was 178)
+1 💚	mvnsite	0m 54s		the patch passed
+1 💚	javadoc	0m 44s		the patch passed with JDK Ubuntu-11.0.27+6-post-Ubuntu-0ubuntu120.04
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+1 💚	spotbugs	2m 0s		the patch passed
+1 💚	shadedclient	38m 14s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
-1 ❌	unit	122m 48s	/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt	hadoop-yarn-server-resourcemanager in the patch failed.
+1 💚	asflicense	0m 38s		The patch does not generate ASF License warnings.
		286m 36s

Reason	Tests
Failed junit tests	hadoop.yarn.server.resourcemanager.reservation.TestReservationSystem
	hadoop.yarn.server.resourcemanager.resourcetracker.TestNMReconnect

Subsystem	Report/Notes
Docker	ClientAPI=1.51 ServerAPI=1.51 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8014/1/artifact/out/Dockerfile
GITHUB PR	#8014
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux f33e1cb3079c 5.15.0-153-generic #163-Ubuntu SMP Thu Aug 7 16:37:18 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
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git revision	trunk / `4cf4cb6`
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-8014/1/testReport/
Max. process+thread count	959 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager U: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8014/1/console
versions	git=2.25.1 maven=3.9.11 spotbugs=4.2.2
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hadoop-yetus · 2025-10-07T15:37:21Z

💔 -1 overall

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+0 🆗	reexec	14m 38s		Docker mode activated.
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			_ trunk Compile Tests _
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			_ Patch Compile Tests _
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-0 ⚠️	checkstyle	0m 34s	/results-checkstyle-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt	hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager: The patch generated 8 new + 215 unchanged - 1 fixed = 223 total (was 216)
+1 💚	mvnsite	0m 52s		the patch passed
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			_ Other Tests _
-1 ❌	unit	113m 34s	/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt	hadoop-yarn-server-resourcemanager in the patch failed.
+1 💚	asflicense	0m 38s		The patch does not generate ASF License warnings.
		261m 39s

Reason	Tests
Failed junit tests	hadoop.yarn.server.resourcemanager.resourcetracker.TestNMReconnect
	hadoop.yarn.server.resourcemanager.reservation.TestReservationSystem

Subsystem	Report/Notes
Docker	ClientAPI=1.51 ServerAPI=1.51 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8014/2/artifact/out/Dockerfile
GITHUB PR	#8014
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 839f6acff1a4 5.15.0-156-generic #166-Ubuntu SMP Sat Aug 9 00:02:46 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
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Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8014/2/testReport/
Max. process+thread count	952 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager U: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8014/2/console
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hadoop-yetus · 2025-10-07T20:34:07Z

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 35s		Docker mode activated.
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+1 💚	test4tests	0m 0s		The patch appears to include 1 new or modified test files.
			_ trunk Compile Tests _
-1 ❌	mvninstall	47m 45s	/branch-mvninstall-root.txt	root in trunk failed.
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			_ Patch Compile Tests _
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			_ Other Tests _
-1 ❌	unit	113m 2s	/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt	hadoop-yarn-server-resourcemanager in the patch failed.
+1 💚	asflicense	0m 38s		The patch does not generate ASF License warnings.
		246m 41s

Subsystem	Report/Notes
Docker	ClientAPI=1.51 ServerAPI=1.51 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8014/4/artifact/out/Dockerfile
GITHUB PR	#8014
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 799dbe8aab4d 5.15.0-156-generic #166-Ubuntu SMP Sat Aug 9 00:02:46 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
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Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8014/4/testReport/
Max. process+thread count	934 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager U: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8014/4/console
versions	git=2.25.1 maven=3.9.11 spotbugs=4.2.2
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hadoop-yetus · 2025-10-07T20:47:30Z

💔 -1 overall

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+0 🆗	reexec	1m 10s		Docker mode activated.
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+1 💚	test4tests	0m 0s		The patch appears to include 1 new or modified test files.
			_ trunk Compile Tests _
-1 ❌	mvninstall	48m 6s	/branch-mvninstall-root.txt	root in trunk failed.
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			_ Other Tests _
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+1 💚	asflicense	0m 38s		The patch does not generate ASF License warnings.
		262m 27s

Subsystem	Report/Notes
Docker	ClientAPI=1.51 ServerAPI=1.51 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8014/3/artifact/out/Dockerfile
GITHUB PR	#8014
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 0c2d4521f80f 5.15.0-153-generic #163-Ubuntu SMP Thu Aug 7 16:37:18 UTC 2025 x86_64 x86_64 x86_64 GNU/Linux
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Max. process+thread count	976 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager U: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-8014/3/console
versions	git=2.25.1 maven=3.9.11 spotbugs=4.2.2
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hadoop-yetus · 2025-10-08T04:39:58Z

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
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			_ trunk Compile Tests _
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			_ Other Tests _
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Fix-Rm-Unit-Crash.

hadoop-yetus · 2025-10-08T10:14:00Z

🎊 +1 overall

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			_ Other Tests _
+1 💚	unit	122m 54s		hadoop-yarn-server-resourcemanager in the patch passed.
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hadoop-yetus · 2025-10-08T10:14:48Z

🎊 +1 overall

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+1 💚	asflicense	0m 37s		The patch does not generate ASF License warnings.
		247m 11s

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hadoop-yetus · 2025-10-08T10:19:47Z

🎊 +1 overall

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		250m 53s

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versions	git=2.25.1 maven=3.9.11 spotbugs=4.2.2
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slfan1989 · 2025-10-08T11:43:36Z

@cnauroth @steveloughran @szetszwo Could you please help review this PR? Thank you very much!

This PR fixes an issue that caused the YARN ResourceManager to crash during JUnit tests.
Instead of calling System.exit(-1) on failure, the process now continues safely, ensuring that all assertions are still executed.
This change does not affect the correctness of existing assertions and improves test robustness.

szetszwo

+1 the change looks good.

slfan1989 · 2025-10-09T00:07:49Z

@szetszwo Thank you very much for helping review the code!

github-actions bot added YARN trunk labels Oct 7, 2025

slfan1989 marked this pull request as draft October 7, 2025 03:03

slfan1989 force-pushed the fix-rm-unit-crash branch 2 times, most recently from 33510fe to 4ad6019 Compare October 7, 2025 16:26

slfan1989 force-pushed the fix-rm-unit-crash branch from e4dadc1 to ade7557 Compare October 8, 2025 05:50

slfan1989 changed the title ~~[TEST] Fix crash issue in RM unit tests.~~ YARN-11876. Fix AsyncDispatcher crash in TestAppManager Oct 8, 2025

slfan1989 marked this pull request as ready for review October 8, 2025 05:53

YARN-11876. Fix AsyncDispatcher crash in TestAppManager.

e934ce3

Fix-Rm-Unit-Crash.

slfan1989 force-pushed the fix-rm-unit-crash branch from aea6da2 to e934ce3 Compare October 8, 2025 06:07

szetszwo approved these changes Oct 8, 2025

View reviewed changes

slfan1989 merged commit 5f36943 into apache:trunk Oct 9, 2025
4 checks passed

slfan1989 mentioned this pull request Oct 10, 2025

[DISCUSS] [JDK17] Upgrade JUnit / JavaDoc from 4 to 5. #7337

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YARN-11876. Fix AsyncDispatcher crash in TestAppManager #8014

YARN-11876. Fix AsyncDispatcher crash in TestAppManager #8014

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YARN-11876. Fix AsyncDispatcher crash in TestAppManager #8014

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