Gwteventservice在激活/初始化时出错

有人能帮我解决这个错误吗

我正在使用GWT2.5.1和Gwteventservice 1.2.1（我还尝试构建新版本的1.3，同样的错误）

找到解决方案： 必须将此servlet添加到web.xml

<servlet>
        <servlet-name>eventServiceImpl</servlet-name>
        <servlet-class>de.novanic.eventservice.service.EventServiceImpl</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>eventServiceImpl</servlet-name>
        <url-pattern>/serverpusch/gwteventservice</url-pattern>
    </servlet-mapping>

eventServiceImpl
de.novanic.eventservice.service.EventServiceImpl
eventServiceImpl
/serverpusch/gwteventservice

RemoteEventService theRemoteEventService = RemoteEventServiceFactory
                .getInstance().getRemoteEventService();
        // add a listener to the SERVER_MESSAGE_DOMAIN
        theRemoteEventService.addListener(DOMAIN, new RemoteEventListener() {
            public void apply(Event anEvent) {
                System.out.println("aaaa");
            }
        });

<servlet>
        <servlet-name>eventServiceImpl</servlet-name>
        <servlet-class>de.novanic.eventservice.service.EventServiceImpl</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>eventServiceImpl</servlet-name>
        <url-pattern>/serverpusch/gwteventservice</url-pattern>
    </servlet-mapping>