Error when installing MyFaces in WEB-INF/lib

[fabio.ita04]

Hi,

I'm getting the following error when placing MyFaces jars in lib project:

22:58:26,343 INFO [FacesConfigurator] Reading config /WEB-INF/faces-config.xml
22:58:26,733 ERROR [StartupServletContextListener] Error initializing ServletContext
java.lang.IllegalArgumentException: Class org.jboss.seam.jsf.SeamApplicationFactory is no javax.faces.application.ApplicationFactory

The error doesn't occurs when myfaces jars are removed. Any help?

the faces-config:

<faces-config>
 <application>
 <view-handler>com.sun.facelets.FaceletViewHandler</view-handler>
 </application>

 <lifecycle>
 <phase-listener>org.jboss.seam.jsf.SeamPhaseListener</phase-listener>
 </lifecycle>
</faces-config>

web.xml:

...
<!-- Seam -->
<listener>
 <listener-class>org.jboss.seam.servlet.SeamListener</listener-class>
</listener>

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

<context-param>
 <param-name>javax.faces.DEFAULT_SUFFIX</param-name>
 <param-value>.xhtml</param-value>
</context-param>

<context-param>
 <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
 <param-value>client</param-value>
</context-param>

<servlet>
 <servlet-name>FacesServlet</servlet-name>
 <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
 <load-on-startup>1</load-on-startup>
</servlet>

<!-- Faces Servlet Mapping -->
<servlet-mapping>
 <servlet-name>FacesServlet</servlet-name>
 <url-pattern>*.htm</url-pattern>
</servlet-mapping>

[norman.richards]

JBoss provides myfaces at the system level. When you duplicate system-level JARs in your application, you can run into all sorts of problems when classes loaded from one classloader interact with ones loaded from another. I don't know which classes are coming from which classloader, but that's not that important. The important thing is to know not to do it.

[fabio.ita04]

more details:

Deployment in JBoss 4.0.5 server.

jars placed in lib directory (every jar is listed below):

 commons-beanutils-1.7.0
 commons-codec-1.3
 commons-collections-3.1
 commons-digester-1.6
 commons-el-1.0.jar
 commons-lang-2.1
 el-api
 el-ri
 jsf-facelets-1.1.11
 jstl-1.1.0
 myfaces-api-1.1.4
 myfaces-impl-1.1.4
 standard

[fabio.ita04]

Thanx! Thats it.

(You answered before I supplied the details, I read your answer just after posted the second message)