The following test times out intermittently in JDK 21 CI:

java/awt/dnd/DragOverDropTargetPerformanceTest.java

Excerpt from the log file:

#section:main
----------messages:(9/379)----------
command: main DragOverDropTargetPerformanceTest
reason: Assumed action based on file name: run main DragOverDropTargetPerformanceTest
started: Tue May 28 08:14:15 UTC 2024
Mode: othervm
Additional options from @modules: --add-modules java.desktop
Timeout information:
--- Timeout information end.
finished: Tue May 28 10:19:32 UTC 2024
elapsed time (seconds): 7517.211

----------System.out:(1/37)----------
Timeout signalled after 240 seconds
----------System.err:(12/904)----------
java.lang.RuntimeException: The test failed.Over drag source: 3058.Over drop target: 1716884060207
at DragOverDropTargetPerformanceTest.start(DragOverDropTargetPerformanceTest.java:135)
at DragOverDropTargetPerformanceTest.main(DragOverDropTargetPerformanceTest.java:75)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
at java.base/java.lang.reflect.Method.invoke(Method.java:580)
at com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:138)
at java.base/java.lang.Thread.run(Thread.java:1583)

JavaTest Message: Test threw exception: java.lang.RuntimeException: The test failed.Over drag source: 3058.Over drop target: 1716884060207
JavaTest Message: shutting down test

result: Error. Program `...\jdk-21.0.5\bin\java' timed out (timeout set to 240000ms, elapsed time including timeout handling was 7517201ms).

So the test failed by throwing an exception but it failed to shut down the JVM. A timeout was raised after 240000ms (4 minutes) yet the test shut down after 7517201ms (125 minutes = 2 hours and 5 minutes).


This test has JavaThread dumps

"name": "main",
"stack": [
    "java.base/java.lang.Object.wait0(Native Method)",
    "java.base/java.lang.Object.wait(Object.java:366)",
    "java.base/java.lang.Thread.join(Thread.java:2078)",
    "java.base/java.lang.Thread.join(Thread.java:2154)",
    "com.sun.javatest.regtest.agent.MainWrapper.main(MainWrapper.java:85)"
]

"name": "MainThread",
"stack": [
    "java.base/java.lang.Object.wait0(Native Method)",
    "java.base/java.lang.Object.wait(Object.java:366)",
    "java.base/java.lang.Thread.join(Thread.java:2078)",
    "java.base/java.lang.Thread.join(Thread.java:2154)",
    "java.base/java.lang.ApplicationShutdownHooks.runHooks(ApplicationShutdownHooks.java:114)",
    "java.base/java.lang.ApplicationShutdownHooks$1.run(ApplicationShutdownHooks.java:47)",
    "java.base/java.lang.Shutdown.runHooks(Shutdown.java:130)",
    "java.base/java.lang.Shutdown.exit(Shutdown.java:167)",
    "java.base/java.lang.Runtime.exit(Runtime.java:188)",
    "java.base/java.lang.System.exit(System.java:1920)",
    "com.sun.javatest.regtest.agent.AStatus.exit(AStatus.java:198)",
    "com.sun.javatest.regtest.agent.MainWrapper.handleTestException(MainWrapper.java:106)",
    "com.sun.javatest.regtest.agent.MainWrapper.access$000(MainWrapper.java:36)",
    "com.sun.javatest.regtest.agent.MainWrapper$MainTask.run(MainWrapper.java:147)",
    "java.base/java.lang.Thread.run(Thread.java:1583)"
]

"name": "AWT-Shutdown",
"stack": [
    "java.base\/java.lang.Object.wait0(Native Method)",
    "java.base\/java.lang.Object.wait(Object.java:366)",
    "java.base\/java.lang.Object.wait(Object.java:339)",
    "java.desktop\/sun.awt.AWTAutoShutdown.run(AWTAutoShutdown.java:291)",
    "java.base\/java.lang.Thread.run(Thread.java:1583)"
]

"name": "ToolkitShutdown",
"stack": [
    "java.desktop/sun.awt.windows.WToolkit.shutdown(Native Method)",
    "java.base/java.lang.Thread.run(Thread.java:1583)"
]

Complete thread dumps are available in DragOverDropTargetPerformanceTest-JavaThread-dumps.7z.