Caused by: org.xml.sax.SAXException: cvc-complex-type.2.4.a: Invalid content was found starting with element 'servlet-name'. One of '{"http://java.sun.com/xml/ns/javaee":description, "http://java.sun.com/xml/ns/javaee":display-name, "http://java.sun.com/xml/ns/javaee":icon, "http://java.sun.com/xml/ns/javaee":servlet-name}' is expected. @ vfszip:/home/deruelle/servers/jboss-5.0.0.GA/server/default/deploy/call-blocking-1.2-SNAPSHOT.war/WEB-INF/sip.xml[16,17] So, it expects "http://java.sun.com/xml/ns/javaee":servlet-name Which means javaee:servlet-name in the xml. It won't work with the namespace declarations commented out. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4200611#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...