Servlet访问报错javax.servlet.ServletException: non-HTTP request or response

JBoss 5.1 访问servlet报错

javax.servlet.ServletException: non-HTTP request or response
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:804)
...

原因是运行环境lib中包含了javaee-api-5.0-1.jar，删除即可。