I'm trying to make a XMLHttpRequest from a JavaScript page to a Java Servlet.I found out lots of problem because it's first time that I do this. The main problem it's that the servlet doesn't work!It give me this error:
HTTP Status 500 - Servlet execution threw an exception type: Exception report message: Servlet execution threw an exception description: The server encountered an internal error that prevented it from fulfilling this request. exception: javax.servlet.ServletException: Servlet execution threw an exceptionroot cause java.lang.NoClassDefFoundError: com/google/appengine/api/chann