Web Socket and Jetty Error

Today I compiled the source code of WebSocketChatServlet and Web Socket (around sic java files in org.eclipse.jetty.websocket). I was able to make a war and deployed into the Jetty 7.0.2 server.

When I run the Web Socket chat application, I am getting runtime error..

>>>

java.lang.NullPointerException

at org.eclipse.jetty.websocket.WebSocketFactory.upgrade(WebSocketFactory

.java:92)

at org.eclipse.jetty.websocket.WebSocketServlet.service(WebSocketServlet

.java:60).

At line 92 of WebSocketFactory is a

ConnectedEndPoint endp = (ConnectedEndPoint)http.getEndPoint();

I don't know why it is throwing the line.

I guess I miss one or two jar files, I dont have idea what is exactly. If you know please write to me.

In Lib folder, I have six jars:

1. Jetty-Continuation.

2. Jetty Http

3. Jetty-io

4. Jetty-Server

5. Jetty-Servlets

6. Jetty-util

I will edit Web Socket java files and try to add more on this concept.