java - Error when implementing 'hello world' web-service -


i'm trying in guide http://www.eclipse.org/webtools/community/education/web/t320/implementing_a_simple_web_service.pdf, instead of tomcat use jboss 7.1. server starts should, while there should 3 windows methods, input , result, have first 2 , in result there error shown below. i'm not sure wrong, never did before useful. assume there missing, need add library?

http status 500 -    type exception report  message   description server encountered internal error () prevented fulfilling request.  exception  javax.servlet.servletexception: java.lang.noclassdeffounderror: defaultnamespace/testproxy     org.apache.jasper.servlet.jspservlet.service(jspservlet.java:261)     javax.servlet.http.httpservlet.service(httpservlet.java:847)    root cause  java.lang.noclassdeffounderror: defaultnamespace/testproxy     java.lang.class.getdeclaredconstructors0(native method)     java.lang.class.privategetdeclaredconstructors(unknown source)     java.lang.class.getconstructor0(unknown source)     java.lang.class.newinstance(unknown source)     org.jboss.as.web.deployment.webinjectioncontainer.newinstance(webinjectioncontainer.java:95)     org.apache.jasper.servlet.jspservletwrapper.getservlet(jspservletwrapper.java:145)     org.apache.jasper.servlet.jspservletwrapper.service(jspservletwrapper.java:324)     org.apache.jasper.servlet.jspservlet.servicejspfile(jspservlet.java:326)     org.apache.jasper.servlet.jspservlet.service(jspservlet.java:253)     javax.servlet.http.httpservlet.service(httpservlet.java:847)    root cause  java.lang.classnotfoundexception: defaultnamespace.testproxy [module "deployment.testclientear.ear.testclient.war:main" service module loader]     org.jboss.modules.moduleclassloader.findclass(moduleclassloader.java:190)     org.jboss.modules.concurrentclassloader.performloadclassunchecked(concurrentclassloader.java:468)     org.jboss.modules.concurrentclassloader.performloadclasschecked(concurrentclassloader.java:456)     org.jboss.modules.concurrentclassloader.performloadclass(concurrentclassloader.java:398)     org.jboss.modules.concurrentclassloader.loadclass(concurrentclassloader.java:120)     org.apache.jasper.servlet.jasperloader.loadclass(jasperloader.java:131)     org.apache.jasper.servlet.jasperloader.loadclass(jasperloader.java:67)     java.lang.class.getdeclaredconstructors0(native method)     java.lang.class.privategetdeclaredconstructors(unknown source)     java.lang.class.getconstructor0(unknown source)     java.lang.class.newinstance(unknown source)     org.jboss.as.web.deployment.webinjectioncontainer.newinstance(webinjectioncontainer.java:95)     org.apache.jasper.servlet.jspservletwrapper.getservlet(jspservletwrapper.java:145)     org.apache.jasper.servlet.jspservletwrapper.service(jspservletwrapper.java:324)     org.apache.jasper.servlet.jspservlet.servicejspfile(jspservlet.java:326)     org.apache.jasper.servlet.jspservlet.service(jspservlet.java:253)     javax.servlet.http.httpservlet.service(httpservlet.java:847 


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