JDI tests fail due to "ERROR: Exception : nsk.share.jdi.JDITestRuntimeException: JDITestRuntimeException : ** event IS NOT a breakpoint **"

The following test failed in the JDK15 CI:

vmTestbase/nsk/jdi/EventRequest/addCountFilter/addcountfilter001/TestDescription.java

Here's a snippet from the log file:

debugee.stderr> **> debuggee: entered: method11
--> debugger: eventRequest1.addCountFilter(1); InvalidRequestStateException is expected
--> debugger: InvalidRequestStateException
--> debugger: ......eventRManager.deleteEventRequest(eventRequest1);
--> debugger: eventRequest1.addCountFilter(1); InvalidRequestStateException is expected
--> debugger: InvalidRequestStateException
--> debugger: breakpointForCommunication
# ERROR: ##> debugger: ERROR: Exception : nsk.share.jdi.JDITestRuntimeException: JDITestRuntimeException : ** event IS NOT a breakpoint **
The following stacktrace is for failure analysis.
nsk.share.TestFailure: ##> debugger: ERROR: Exception : nsk.share.jdi.JDITestRuntimeException: JDITestRuntimeException : ** event IS NOT a breakpoint **
at nsk.share.Log.logExceptionForFailureAnalysis(Log.java:428)
at nsk.share.Log.complain(Log.java:399)
at nsk.share.jdi.JDIBase.log3(JDIBase.java:67)
at nsk.jdi.EventRequest.addCountFilter.addcountfilter001.runTest(addcountfilter001.java:221)
at nsk.jdi.EventRequest.addCountFilter.addcountfilter001.runThis(addcountfilter001.java:151)
at nsk.jdi.EventRequest.addCountFilter.addcountfilter001.run(addcountfilter001.java:92)
at nsk.jdi.EventRequest.addCountFilter.addcountfilter001.main(addcountfilter001.java:85)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at PropertyResolvingWrapper.main(PropertyResolvingWrapper.java:104)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:832)
# ERROR: ##> debugger: test phase has not finished normally: debuggee is still alive
--> debugger: ......forcing: vm.exit();
TEST FAILED


#>
#> SUMMARY: Following errors occured
#> during test execution:
#>
# ERROR: ##> debugger: ERROR: Exception : nsk.share.jdi.JDITestRuntimeException: JDITestRuntimeException : ** event IS NOT a breakpoint **
# ERROR: ##> debugger: test phase has not finished normally: debuggee is still alive
----------System.err:(0/0)----------