The link, https://docs.oracle.com/cd/E19355-01/820-1072/ahiid/index.html it suggests that JAXBElement is required also if there are element nillable="true" and minOccurs="0" or if there are two global elements with the same named xsd:complexType.

We always need a client to be regenerated using a jaxbBindings.xml with the option <jaxb:globalBindings generateElementProperty="false" />, the web service client is working.

Some of the implementation except CXF, work without having the file, jaxbBindings.xml file. Is that an issue with jbossws-cxf ?