Cannot get exception as pass-by-reference, despite of pass-by-value="false"

Issue

• Servlet received java.io.NotSerializableException: com.sun.xml.messaging.saaj.soap.ver1_1.SOAPPart1_1Impl, instead of javax.xml.ws.soap.SOAPFaultException: SOAPFault method failed Test
• We set <in-vm-remote-interface-invocation pass-by-value="false"/> in ejb3 subsystem. So EJB works as pass-by-reference but exception is still pass-by-value.