HTTP method GET is not supported by this URL

I'm calling servlets which has implemented CometProcessor interface, and whenever I try to call the servlets with get request, I'm getting the above error. May I know the reason?

public class ChatServlets 
    extends HttpServlet implements CometProcessor { 

 public void event(CometEvent event) 
开发者_运维技巧    throws IOException, ServletException {
    HttpServletRequest request = event.getHttpServletRequest();
    HttpServletResponse response = event.getHttpServletResponse();
    if (event.getEventType() == CometEvent.EventType.BEGIN) {
        response.getWriter().println("Welcome ");
    } else if (event.getEventType() == CometEvent.EventType.READ) {
            response.getWriter().println("Bye");
    }
    }
}

From this document:

IMPORTANT NOTE: Usage of these features requires using the APR or NIO HTTP connectors. The classic java.io HTTP connector and the AJP connectors do not support them.

By default you get classic java.io HTTP connector configured in your server.xml. Have you changed it to NIO connector?