29.3. JBossWeb, EAP 5.0.x Support

The JBossWeb container is shipped with EAP 5.0.x and higher requires the JBoss Native plug-in to enable asynchronous HTTP processing. See the JBoss Web documentation for information about this process.
Your deployed RESTEasy applications must use a different RESTEasy Servlet: org.jboss.resteasy.plugins.server.servlet.JBossWebDispatcherServlet. This class is available within the async-http-jbossweb-xxx.jar (or within the Maven repository under the async-http-jbossweb artifact ID) in web.xml:
<servlet>
   <servlet-name>Resteasy</servlet-name>
   <servlet-class>org.jboss.resteasy.plugins.server.servlet.JBossWebDispatcherServlet</servlet-class>
</servlet>