There are a number of test failures, on macosx, due to BindException in the invocation of
TestLibrary.createRegistryOnUnusedPort as shown below.
This is an imtermitent failure, due to a number of possible conditions: a race condition in the port allocation algorithm, and a macosx port allocation bug.

Nonetheless, this is an issue that can occur and the current TestLibrary.createRegistryOnUnusedPort needs to be adapted to accomodate this possibility and execute a retry in the event of such an exception

java.net.BindException: Address already in use (Bind failed)
at sun.rmi.transport.tcp.TCPTransport.listen(TCPTransport.java:346)
at sun.rmi.transport.tcp.TCPTransport.exportObject(TCPTransport.java:254)
at sun.rmi.transport.tcp.TCPEndpoint.exportObject(TCPEndpoint.java:412)
at sun.rmi.transport.LiveRef.exportObject(LiveRef.java:147)
at sun.rmi.server.UnicastServerRef.exportObject(UnicastServerRef.java:237)
at sun.rmi.registry.RegistryImpl.setup(RegistryImpl.java:219)
at sun.rmi.registry.RegistryImpl.<init>(RegistryImpl.java:204)
at java.rmi.registry.LocateRegistry.createRegistry(LocateRegistry.java:203)
at TestLibrary.createRegistryOnUnusedPort(TestLibrary.java:410)