deploy error

10:58:44,120 INFO  [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/]] (MSC service thread 1-7) Marking servlet javax.ws.rs.core.Application as unavailable
10:58:44,121 ERROR [org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/]] (MSC service thread 1-7) Servlet  threw load() exception: javax.servlet.ServletException: No servlet class has been specified for servlet javax.ws.rs.core.Application
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1149) [jbossweb-7.0.13.Final.jar:]
	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1102) [jbossweb-7.0.13.Final.jar:]
	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3655) [jbossweb-7.0.13.Final.jar:]
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:3873) [jbossweb-7.0.13.Final.jar:]
	at org.jboss.as.web.deployment.WebDeploymentService.start(WebDeploymentService.java:90) [jboss-as-web-7.1.1.Final.jar:7.1.1.Final]
	at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
	at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [rt.jar:1.7.0_45]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [rt.jar:1.7.0_45]
	at java.lang.Thread.run(Thread.java:744) [rt.jar:1.7.0_45]