在Jboss 5.0上启动JSF应用程序时出错

Question

I'm new to JSF, I've recently started working with a tutorial. I've created application exactly as the information provided in the tutorial. However when I start the server, I'm getting following error:

Exception sending context initialized event to listener instance of class org.jboss.web.jsf.integration.config.JBossJSFConfigureListener
java.lang.ClassCastException: com.sun.faces.config.WebConfiguration cannot be cast to com.sun.faces.config.WebConfiguration
    at com.sun.faces.config.WebConfiguration.getInstance(WebConfiguration.java:154)
    at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:145)

web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
    <display-name>Hello, World</display-name>
    <description>Welcome to JavaServerFaces</description>

    <servlet>
        <servlet-name>Faces Servlet</servlet-name>
        <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>Faces Servlet</servlet-name>
        <url-pattern>/faces/*</url-pattern>
    </servlet-mapping>

    <listener>
        <listener-class>com.sun.faces.config.ConfigureListener</listener-class>
    </listener>

</web-app>

As indicated in tutorial I've added jsf-api and jsf-impl in Web-Inf/lib, however googling for the same I found that jboss has its own jsf version which might be polluting my application with multiple jsf versions. If that's the case then how do I resolve the issue or if I'm wrong then what is the reason behind the error ?

Just to add, as I believe its the jar files conflit I've tried to add the jar files imported with jboss from jboss-5.1.0.GA\\server\\default\\deploy\\jbossweb.sar\\jsf-libs , still all in vain.

Please help.

Answer 1

A better way to cope up with the conflict is to add a context parameter in web.xml as I've mentioned below:

<context-param>
      <param-name>org.jboss.jbossfaces.WAR_BUNDLES_JSF_IMPL</param-name>
      <param-value>true</param-value>
</context-param>

Check out: Bundling JSF Inside Your WAR

Answer 2

I don't know how your Eclipse is configured(Java EE/JBoss tools and so on). But you should add a server runtime to your webproject:

1. Add server runtime

1.1 open Server view in Eclipse

1.2 Context menu and then -> new Server->select JBoss 5.0 server type

1.3 Server runtime enviroment-> add

1.4 Home directory-> your sever home/default for example

1. Now change the buildpath of your webproject.

2.1. Add library->server runtime->select your new runtime

2.3 No JSF or other libs in your ear or in your webprojects Web-Inf/lib

Now you have all the Jboss-libs including the jsf-libs in your classpath - controlled by Eclipse - and you don't have to worry about setting jars from server lib and so on.

I hope it helps. In a similar way I just create a test-project

Answer 3

Yep looks like a jar version collision

Remove JSF dependencies from Application: If you are building the project using maven, you can set the dependencies scope to provided .

Remove dependencies scope from JSF (if you want to use your own jars.) Consider using Jboss application description and exclude the JSF dependecies.

I am not aware of JBoss 5 XML format, so posting for JBoss 7

<jboss-deployment-structure>
    <deployment>
        <exclusions>
            <module name="com.sun.jsf-impl" />
        </exclusions>
    </deployment>
</jboss-deployment-structure>

Should be something similar to this.