Facelets tab lib not recognised by Eclipse/Tomcat 6

Question

I included this in my index.jsp JSF file:

<%@ taglib prefix="ui" uri="http://java.sun.com/jsf/facelets"%>

and Eclipse underlines the URL, hovering gives this:

Cannot find the tag library descriptor for "http://java.sun.com/jsf/facelets"

Deploying and trying to start Tomcat 6 using the Tomcat plugin causes this:

|STDOUT| 2010-03-03 17:57:29,872 | INFO  | [main]: Serialization provider : class org.apache.myfaces.shared_impl.util.serial.DefaultSerialFactory
    |STDOUT| 2010-03-03 17:57:29,904 | INFO  | [main]: ServletContext 'C:\Program Files\Apache Software Foundation\Tomcat 6.0\webapps\myapp\' initialized.
    |STDOUT| 2010-03-03 17:57:29,904 | INFO  | [main]: Checking for plugins:org.apache.myfaces.FACES_INIT_PLUGINS
    03-Mar-2010 17:57:29 org.apache.catalina.core.StandardContext start
    SEVERE: Error listenerStart
    03-Mar-2010 17:57:29 org.apache.catalina.core.StandardContext start
    SEVERE: Context [/myapp] startup failed due to previous errors

...

03-Mar-2010 17:57:30 com.sun.faces.config.ConfigureListener contextDestroyed
SEVERE: Unexpected exception when attempting to tear down the Mojarra runtime
java.lang.IllegalStateException: Application was not properly initialized at startup, could not find Factory: javax.faces.application.ApplicationFactory
    at javax.faces.FactoryFinder$FactoryManager.getFactory(FactoryFinder.java:804)

My web.xml contains this

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

My face-config.xml contains this

    <application>
    <!-- tell JSF to use Facelets -->
    <view-handler>com.sun.facelets.FaceletViewHandler</view-handler>
</application>

And my application build has the latest JSF 2.0.2 jsf-api.jar and jsf-impl.jar. I've also got MyFaces 1.2.8 and all the latest commons jars. The app was building fine til I upgraded JSF. I would at least expect a run time error but here Eclipse cannot see the taglib. What else could I be missing?

EDIT

For full information - I took out Mojarra and left in Myfaces. This meant I needed to remove this from my web.xml:

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

and replace it with the equivalent for myfaces:

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

Thanks

You cannot mix multiple implementations of an abstract specification. Use either Mojarra OR MyFaces as an implementation of the JSF specification. Then there are JSF component libraries like RichFaces, Tomahawk, etc..etc.. which you can just keep using on top of one of the JSF implementations. Bozho has it right. — BalusC

Bozho Bozho · Accepted Answer · 2010-03-03T19:45:48

Do not mix JSF 2.0 with JSF pre-2.0. It may lead to unexpected results (like the one above).

Choose a JSF 2.0 implementation (mojarra as it seems) and remove all myfaces and facelets libraries.

Facelets tab lib not recognised by Eclipse/Tomcat 6

2 Answers