The following test failed in the JDK16 CI:

vmTestbase/nsk/jvmti/SetEventNotificationMode/setnotif001/TestDescription.java

Here's a snippet from the log file:

#section:main
----------messages:(4/274)----------
command: main -agentlib:setnotif001 nsk.jvmti.SetEventNotificationMode.setnotif001
reason: User specified action: run main/othervm/native -agentlib:setnotif001 nsk.jvmti.SetEventNotificationMode.setnotif001
Mode: othervm [/othervm specified]
elapsed time (seconds): 16.681
----------configuration:(0/0)----------
----------System.out:(1/50)----------
No notification: event JVMTI_EVENT_FRAME_POP (61)
----------System.err:(0/0)----------
----------rerun:(46/8386)*----------

The test task's JVM args are:
-Xcomp -XX:+CreateCoredumpOnCrash -ea -esa -XX:CompileThreshold=100 -XX:+UnlockExperimentalVMOptions -server -XX:-TieredCompilation -XX:+DeoptimizeALot