And then I found it was caused by the xmlapi jar. In my RA.rar, I have the xmlapi.jar, whose version is lower than the xmlapi in the $JBoss_HOME/lib/endorsed folder, so I remove the xmlapi.jar in my RA. Then I start the jboss again, and see another error is: 22:28:26,091 ERROR [STDERR] java.lang.ClassCastException: $Proxy63 22:28:26,091 ERROR [STDERR] at sun.reflect.annotation.AnnotationParser.annotationForMap(Annotati onParser.java:239) 22:28:26,091 INFO [Http11BaseProtocol] Starting Coyote HTTP/1.1 on http-0.0.0.0-8080 22:28:26,123 ERROR [STDERR] at sun.reflect.annotation.AnnotationParser.parseAnnotation(Annotatio nParser.java:229) 22:28:26,123 ERROR [STDERR] at sun.reflect.annotation.AnnotationParser.parseAnnotations2(Annotat ionParser.java:69) 22:28:26,123 ERROR [STDERR] at sun.reflect.annotation.AnnotationParser.parseAnnotations(Annotati onParser.java:52) 22:28:26,123 ERROR [STDERR] at java.lang.Class.initAnnotationsIfNecessary(Class.java:3031) 22:28:26,123 ERROR [STDERR] at java.lang.Class.getAnnotation(Class.java:2989) 22:28:26,123 ERROR [STDERR] at org.apache.cxf.jaxws.support.JaxWsImplementorInfo.initialise(JaxW sImplementorInfo.java:259) It seems it uses the JBoss server lib again, instead of using the library in my RAR file. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4096121#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...