The test java/awt/dnd/ModalDialogOnDropDeadlockTest.java times out on Windows:

----------messages:(9/359)----------
command: main ModalDialogOnDropDeadlockTest
reason: User specified action: run main ModalDialogOnDropDeadlockTest
started: Thu Mar 27 10:54:09 UTC 2025
Mode: othervm
Additional options from @modules: --add-modules java.desktop
Timeout information:
--- Timeout information end.
finished: Thu Mar 27 13:00:03 UTC 2025
elapsed time (seconds): 7554.093
----------configuration:(3/43)----------
Boot Layer
  add modules: java.desktop

----------System.out:(1/37)----------
Timeout signalled after 240 seconds
----------System.err:(12/726)----------
java.lang.RuntimeException: DnD not finished
        at ModalDialogOnDropDeadlockTest.start(ModalDialogOnDropDeadlockTest.java:200)
        at ModalDialogOnDropDeadlockTest.main(ModalDialogOnDropDeadlockTest.java:90)
        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: DnD not finished

test result: Error. Program `...\jdk-21.0.8\bin\java' timed out (timeout set to 240000ms, elapsed time including timeout handling was 7554078ms).


Note that handling the timeout that signalled after 2 minutes took more than 2 hours. It's the same symptom as in JDK-8333091: the test completed but it fails to exit JVM. This problem is seen in other bugs too.