The following test timed out in the JDK20 CI:

vmTestbase/nsk/jvmti/scenarios/allocation/AP12/ap12t001/TestDescription.java

Here's a snippet from the log file:

#section:main
----------messages:(8/490)----------
command: main -agentlib:ap12t001=-waittime=5,-verbose -XX:-UseGCOverheadLimit nsk.jvmti.scenarios.allocation.AP12.ap12t001
reason: User specified action: run main/othervm/native -agentlib:ap12t001=-waittime=5,-verbose -XX:-UseGCOverheadLimit nsk.jvmti.scenarios.allocation.AP12.ap12t001
started: Fri Oct 28 21:24:18 UTC 2022
Mode: othervm [/othervm specified]
Timeout information:
--- Timeout information end.
finished: Fri Oct 28 21:35:04 UTC 2022
elapsed time (seconds): 646.751
----------configuration:(0/0)----------
----------System.out:(19/638)----------
- ap12t001.cpp, 153: setting event callbacks ...
- ap12t001.cpp, 162: setting event callbacks done
enabling JVMTI events ...
- ap12t001.cpp, 171: enabling the events done

- ap12t001.cpp, 175: agentProc has been set

References are ready for garbage collection
- ap12t001.cpp, 102: Wait for debugee start

- ap12t001.cpp, 106: Let debugee to provoke GC
- ap12t001.cpp, 57: ObjectFree event received for an object with tag 2

- ap12t001.cpp, 57: ObjectFree event received for an object with tag 1

GC called
- ap12t001.cpp, 112: Let debugee to finish
- ap12t001.cpp, 64: VMDeath event received
Timeout refired 480 times
----------System.err:(3/177)----------
java version "20-ea" 2023-03-21
Java(TM) SE Runtime Environment (fastdebug build 20-ea+22-1566)
Java HotSpot(TM) 64-Bit Server VM (fastdebug build 20-ea+22-1566, mixed mode)
----------rerun:(40/6359)*----------