MyFaces 1.2 出现应用程序错误：java.lang.IllegalStateException：没有为此应用程序配置工厂

Question

对于我的应用程序，我使用 Tomcat 6.0.x 和 Mojarra 1.2_04 JSF 实现。 它工作正常，只是我现在想切换到 JSF 的 MyFaces 1.2_10 impl。

在部署我的应用程序期间，出现以下错误：

ERROR [org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/myApp]] StandardWrapper.Throwable
java.lang.IllegalStateException: No Factories configured for this Application. This happens if the faces-initialization does not work at all - make sure that you properly include all configuration settings necessary for a basic faces application and that all the necessary libs are included. Also check the logging output of your web application and your container for any exceptions!
If you did that and find nothing, the mistake might be due to the fact that you use some special web-containers which do not support registering context-listeners via TLD files and a context listener is not setup in your web.xml.
A typical config looks like this;
<listener>
  <listener-class>org.apache.myfaces.webapp.StartupServletContextListener</listener-class>
</listener>

    at javax.faces.FactoryFinder.getFactory(FactoryFinder.java:106)
    at javax.faces.webapp.FacesServlet.init(FacesServlet.java:137)
    at org.apache.myfaces.webapp.MyFacesServlet.init(MyFacesServlet.java:113)
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1172)
    at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:992)
    at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4058)
    at org.apache.catalina.core.StandardContext.start(StandardContext.java:4371)
...

这是我的 web.xml 配置的一部分：

    <servlet>
        <servlet-name>Faces Servlet</servlet-name>
        <!-- <servlet-class>javax.faces.webapp.FacesServlet</servlet-class> -->
        <servlet-class>org.apache.myfaces.webapp.MyFacesServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    ...
    <listener>
         <listener- class>org.apache.myfaces.webapp.StartupServletContextListener</listener-class>
    </listener>

有没有人遇到过类似的错误，我应该做什么来修复它？谢谢！

编辑：

我能够解决这个问题。由于我正在使用 FacesServlet 委托程序，因此事实证明该委托程序导致了问题。 我需要做的就是让这个类实现DelegateFacesServlet，并且我已经删除了org.apache.myfaces.webapp.StartupServletContextListener。现在这是我的 web.xml：

    <servlet>
        <servlet-name>Faces Servlet</servlet-name>
        <!-- <servlet-class>javax.faces.webapp.FacesServlet</servlet-class> -->
        <servlet-class>org.apache.myfaces.webapp.MyFacesServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet>
        <servlet-name>Faces Servlet Delegator</servlet-name>
        <servlet-class>com.myapp.web.FacesServletDelegator</servlet-class>
        <load-on-startup>2</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>Faces Servlet Delegator</servlet-name>
        <url-pattern>*.jsf</url-pattern>
    </servlet-mapping>

这是 FacesServletDelegator

public class PLMFacesServlet extends HttpServlet implements DelegatedFacesServlet {

    private MyFacesServlet delegate;

    public final void init(ServletConfig servletConfig) throws ServletException {
        delegate = new MyFacesServlet();
        delegate.init(servletConfig);
    }

    public final void destroy() {
        delegate.destroy();
    }

    public final ServletConfig getServletConfig() {
        return delegate.getServletConfig();
    }

    public final String getServletInfo() {
        return delegate.getServletInfo();
    }

    public final void service(HttpServletRequest request, HttpServletResponse response) throws ServletException {

       try {
           delegate.service(request, response);
       } catch(Exception e) {}
    }
    // some other code...
}

编辑 2：

按照 BalusC 建议，我编辑了我的 web.xml。 xml 一点，这是最终版本：

<servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet>
    <servlet-name>Faces Servlet Delegator</servlet-name>
    <servlet-class>com.myapp.web.FacesServletDelegator</servlet-class>
    <load-on-startup>2</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>Faces Servlet Delegator</servlet-name>
    <url-pattern>*.jsf</url-pattern>
</servlet-mapping>

Answer 1

就我而言，从 web.xml 中删除以下行：

<load-on-startup>1</load-on-startup>

...使错误消失。

（正在修复纯 Tomcat 7 以与 JSF 配合使用。）