| import org.jboss.ws.core.jaxws.JAXBContextCache; | This already is the problem. You cannot rely on proprietary API . In case the SPI/standard API is not sufficiently open we might need to change that. However I need to understand your use case better in order to give you a qualified answer. Not every supported stack is necessarily using JAXB. So setting JAXB properties might not be the right solution anyway. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4057724#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...