According to JAXWS specification,
EPR builders have to throw IllegalStateException
if not all information is provided.
This have been fixed in JBossWS trunk
under JBWS-2914 umbrella, see commit
http://fisheye.jboss.org/browse/JBossWS/stack/native/trunk/modules/core/src/main/java/org/jboss/ws/core/jaxws/spi/ProviderImpl.java?r1=11529&r2=11533