Class cast exception when trying to deploy Web Service in web application (Jboss EAP 6.1.1)

JBWEB000309: type JBWEB000066: Exception report
JBWEB000068: message JBWEB000261: Class my.test.HelloWorldWs is not a Servlet
JBWEB000069: description JBWEB000145: The server encountered an internal error that prevented it from fulfilling this request.
JBWEB000070: exception
javax.servlet.ServletException: JBWEB000261: Class my.test.HelloWorldWs is not a Servlet
        org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:499)
        org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169)
        org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97)
        org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:336)
        org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
        org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653)
        org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:920)
        java.lang.Thread.run(Thread.java:722)
JBWEB000071: root cause
java.lang.ClassCastException: my.test.HelloWorldWs cannot be cast to javax.servlet.Servlet
        org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:499)
        org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169)
        org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97)
        org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:336)
        org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
        org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653)
        org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:920)
        java.lang.Thread.run(Thread.java:722)
JBWEB000072: note JBWEB000073: The full stack trace of the root cause is available in the JBoss Web/7.2.2.Final-redhat-1 logs.

    HelloWorldService
    us.gov.treasury.irs.srv.test.HelloWorldWs  



    HelloWorldService
    /test/HelloWorldService