javax.servlet.ServletException: Failed to load application class: test.vaadin.MyApplication
	com.vaadin.terminal.gwt.server.ApplicationServlet.init(ApplicationServlet.java:71)
	org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
	org.eclipse.virgo.web.tomcat.support.ApplicationNameTrackingValve.invoke(ApplicationNameTrackingValve.java:33)
	org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395)
	org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250)
	org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
	org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:166)
	org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
	java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	java.lang.Thread.run(Thread.java:619)


note The full stack trace of the root cause is available in the Apache Tomcat/7.0.12 logs.

        // Gets the application class name
        final String applicationClassName = servletConfig
                .getInitParameter("application");
        if (applicationClassName == null) {
            throw new ServletException(
                    "Application not specified in servlet parameters");
        }

        try {
            applicationClass = (Class<? extends Application>) getClassLoader()
                    .loadClass(applicationClassName);
        } catch (final ClassNotFoundException e) {
            throw new ServletException("Failed to load application class: "
                    + applicationClassName);
        }

    protected ClassLoader getClassLoader() throws ServletException {
        // Gets custom class loader
        final String classLoaderName = getApplicationOrSystemProperty(
                "ClassLoader", null);
        ClassLoader classLoader;
        if (classLoaderName == null) {
            classLoader = getClass().getClassLoader();
        } else {
            try {
                final Class<?> classLoaderClass = getClass().getClassLoader()
                        .loadClass(classLoaderName);
                final Constructor<?> c = classLoaderClass
                        .getConstructor(new Class[] { ClassLoader.class });
                classLoader = (ClassLoader) c
                        .newInstance(new Object[] { getClass().getClassLoader() });
            } catch (final Exception e) {
                throw new ServletException(
                        "Could not find specified class loader: "
                                + classLoaderName, e);
            }
        }
        return classLoader;
    }