I know that this is something that's got to do with JAXB. how do i get over it? what is it exactly? below is my source code : @WebService( name = "UpdateService", targetNamespace = "http://deshaw.com", serviceName = "NmUpdateService") @SOAPBinding(style = SOAPBinding.Style.DOCUMENT, use=SOAPBinding.Use.LITERAL) public class NmUpdateService extends HttpServlet { /*some declarations and code go in here */ @WebMethod @WebResult(name="returnValues") public String[] updateAttributes(@WebParam(name="spn")Integer spn, @WebParam(name="attributes")SecurityAttributes[] attributes, @WebParam(name="userName")String userName, @WebParam(name="date")Date date, @WebParam(name="source")Integer source ) { StringBuffer cmd = prepareCommand(spn, attributes, date, source); cmd.append(");}; " ); String[] returnValues = {}; try { Object result = pit.submit(cmd.toString(), returnValues.getClass()); returnValues = (String[]) result; } catch(Exception e) {e.printStackTrace();} return returnValues; } } the web service basically invokes a perl engine and passes a command to it. the exception however has got to do with the datatypes used by the web method, if i am right. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4030726#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...