Dears, I get the following exception while invoking my webservice client on jbossAs inside a webapp. java.lang.LinkageError: loader constraints violated when linking javax/xml/namespace/QName class Seems that this class is contained inside stax-api.jar inside my web-inf/lib. If I remove that jar, I got this exception : javax.xml.stream.FactoryConfigurationError: Provider com.bea.xml.stream.MXParserFactory not found | at javax.xml.stream.FactoryFinder.newInstance(FactoryFinder.java:72) | at javax.xml.stream.FactoryFinder.find(FactoryFinder.java:176) | at javax.xml.stream.FactoryFinder.find(FactoryFinder.java:92) | at javax.xml.stream.XMLInputFactory.newInstance(XMLInputFactory.java:136) | at com.sun.xml.ws.api.streaming.XMLStreamReaderFactory.<clinit>(XMLStreamReaderFactory.java:36) | at com.sun.xml.ws.wsdl.parser.RuntimeWSDLParser.createReader(RuntimeWSDLParser.java:786) | at com.sun.xml.ws.wsdl.parser.RuntimeWSDLParser.resolveWSDL(RuntimeWSDLParser.java:236) | at com.sun.xml.ws.wsdl.parser.RuntimeWSDLParser.parse(RuntimeWSDLParser.java:107) | at com.sun.xml.ws.client.WSServiceDelegate.parseWSDL(WSServiceDelegate.java:226) | Any help will be very appreciated. Thanks a lot View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4122992#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...