java/net/MulticastSocket/Promiscuous.java fails intermittently with:

java.lang.RuntimeException: Unexpected message received

at Promiscuous.receive(Promiscuous.java:57)
at Promiscuous.test(Promiscuous.java:95)
at Promiscuous.main(Promiscuous.java:135)
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)