This is wrong in CorbaOrbService:

String host = properties.getProperty(JacORBSubsystemConstants.ORB_ADDRESS);
String port = properties.getProperty(JacORBSubsystemConstants.ORB_PORT);
properties.setProperty(JacORBSubsystemConstants.JACORB_NAME_SERVICE_INIT_REF,
"corbaloc::" + host + ":" + port + "/" + rootContext);

You can't use a string that may be an IPv6 address in URL like that; the address part needs to be surrounded with [].