vmTestbase/nsk/jdi/ClassLoaderReference/definedClasses tests failed with Unexpected Exception: null

# ERROR: debugger FAILURE > Unexpected Exception: null
The following stacktrace is for failure analysis.
nsk.share.TestFailure: debugger FAILURE > Unexpected Exception: null
at nsk.share.Log.logExceptionForFailureAnalysis(Log.java:428)
at nsk.share.Log.complain(Log.java:399)
at nsk.jdi.ClassLoaderReference.definedClasses.definedclasses005.complain(definedclasses005.java:76)
at nsk.jdi.ClassLoaderReference.definedClasses.definedclasses005.run(definedclasses005.java:97)
at nsk.jdi.ClassLoaderReference.definedClasses.definedclasses005.main(definedclasses005.java:68)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
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:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:835)
com.sun.jdi.ObjectCollectedException
at jdk.jdi/com.sun.tools.jdi.JDWPException.toJDIException(JDWPException.java:55)
at jdk.jdi/com.sun.tools.jdi.ReferenceTypeImpl.classLoader(ReferenceTypeImpl.java:234)
at jdk.jdi/com.sun.tools.jdi.ClassLoaderReferenceImpl.definedClasses(ClassLoaderReferenceImpl.java:64)
at nsk.jdi.ClassLoaderReference.definedClasses.definedclasses005.execTest(definedclasses005.java:141)
at nsk.jdi.ClassLoaderReference.definedClasses.definedclasses005.run(definedclasses005.java:93)
at nsk.jdi.ClassLoaderReference.definedClasses.definedclasses005.main(definedclasses005.java:68)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at PropertyResolvingWrapper.main(PropertyResolvingWrapper.java:104)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:835)
debugee.stderr> debuggee > debuger's <quit> signal received.
debugee.stderr> debuggee > completed succesfully.
binder> Got expected debugee VM exit status: 95