Re: [jetty-users] NPE in WebSocketServlet

[Benedikt Arnold <benedikt.arnold@xxxxxxx>]

Hey Greg,

my first aproach was a bit simplified. It has only debug traces in the  
WebSocket implementation.

I tried a strict copy and paste too but I got the same exception.

Cheers,
Ben

Am 31.12.2009 um 04:21 schrieb Greg Wilkins <gregw@xxxxxxxxxxx>:

> Arnold,
>
> does the demo work for you?
>
> Have you altered the demo in any way?
>
> regards
>
>
>
>
> Benedikt Arnold wrote:
> > Hi,
> > my name is Ben and I'm new to jetty users list.
> >
> > I want to try out websockets whith jetty 7.0.1 but I got a  
> > NullPointerException in WebSocketServlet#service() on line 58  
> > because the http object is null. See stacktrace below.
> >
> > My own implementation of WebSocketServlet is very simple:
> >
> > public class CountWebSocketServlet extends WebSocketServlet {
> >
> >    protected void doGet(HttpServletRequest request,
> >            HttpServletResponse response) throws ServletException,  
> > IOException {
> >        getServletContext().getNamedDispatcher("default").forward 
> > (request,
> >                response);
> >    }
> >
> >    protected WebSocket doWebSocketConnect(HttpServletRequest arg0,  
> > String arg1) {
> >        return new CountWebSocket();
> >    }
> > }
> >
> > Can anyone give me a hint or is this still a bug?
> >
> > Thanks a lot,
> > Ben
> >
> >
> > java.lang.NullPointerException
> >    at org.eclipse.jetty.websocket.WebSocketServlet.service 
> > (WebSocketServlet.java:58)
> >    at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> >    at org.eclipse.jetty.servlet.ServletHolder.handle 
> > (ServletHolder.java:530)
> >    at org.eclipse.jetty.servlet.ServletHandler.doHandle 
> > (ServletHandler.java:427)
> >    at org.eclipse.jetty.server.handler.ScopedHandler.handle 
> > (ScopedHandler.java:119)
> >    at org.eclipse.jetty.security.SecurityHandler.handle 
> > (SecurityHandler.java:457)
> >    at org.eclipse.jetty.server.session.SessionHandler.handle 
> > (SessionHandler.java:182)
> >    at org.eclipse.jetty.server.handler.ContextHandler.doHandle 
> > (ContextHandler.java:933)
> >    at org.eclipse.jetty.servlet.ServletHandler.doScope 
> > (ServletHandler.java:362)
> >    at org.eclipse.jetty.server.handler.ContextHandler.doScope 
> > (ContextHandler.java:867)
> >    at org.eclipse.jetty.server.handler.ScopedHandler.handle 
> > (ScopedHandler.java:117)
> >    at  
> > org.eclipse.jetty.server.handler.ContextHandlerCollection.handle 
> > (ContextHandlerCollection.java:245)
> >    at org.eclipse.jetty.server.handler.HandlerCollection.handle 
> > (HandlerCollection.java:126)
> >    at org.eclipse.jetty.server.handler.HandlerWrapper.handle 
> > (HandlerWrapper.java:113)
> >    at org.eclipse.jetty.server.Server.handle(Server.java:334)
> >    at org.eclipse.jetty.server.HttpConnection.handleRequest 
> > (HttpConnection.java:559)
> >    at org.eclipse.jetty.server.HttpConnection 
> > $RequestHandler.headerComplete(HttpConnection.java:992)
> >    at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java: 
> > 541)
> >    at org.eclipse.jetty.http.HttpParser.parseAvailable 
> > (HttpParser.java:203)
> >    at org.eclipse.jetty.server.HttpConnection.handle 
> > (HttpConnection.java:406)
> >    at org.eclipse.jetty.io.nio.SelectChannelEndPoint.run 
> > (SelectChannelEndPoint.java:462)
> >    at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run 
> > (QueuedThreadPool.java:436)
> >    at java.lang.Thread.run(Thread.java:619)
>
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