How to get web-fragment.xml work

I have the following web-fragment.xml file in the jar file, under META-INF /

I can't seem to get it to work (although I think it was in previous tests).

The same content works in web.xml.

The web application itself is part of the ear, but I would not expect it to make a difference.

I tried using the <web-app> tag and <web fragment>. Where is the help documentation, btw?

The idea is to include my can in all my ear wars (10+) in order to have common things implemented in one place (authentication, ...). A question about the web fragment, I will get everything that works (which was the case with web.xml) as soon as I can switch to this.

was itself in 2.5 before, changed it to 3.0 (and cleared the project to make sure).

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
    <context-param>
        <param-name>javax.faces.FACELETS_RESOURCE_RESOLVER</param-name>
        <param-value>be.epc.common.web.util.EpcResourceResolver</param-value>
    </context-param>    
    <error-page>
        <error-code>403</error-code>
        <location>/epcResources/noaccess.jsf</location>
    </error-page>    
    <error-page>
        <exception-type>javax.ejb.AccessLocalException</exception-type>
        <location>/epcResources/noaccess.jsf</location>
    </error-page>
    <error-page>
        <error-code>404</error-code>
        <location>/epcResources/notfound.jsf</location>
    </error-page>
    <error-page>
        <error-code>500</error-code>
        <location>/epcResources/error.jsf</location>
    </error-page>
    <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>
        <url-pattern>/icefaces/*</url-pattern>
        <url-pattern>*.jsf</url-pattern>
    </servlet-mapping>
    <security-constraint>
        <web-resource-collection>
            <web-resource-name>Toutes pages</web-resource-name>
            <description/>
            <url-pattern>*.xhtml</url-pattern>
            <url-pattern>*.jsf</url-pattern>
        </web-resource-collection>
        <auth-constraint>
            <description/>
            <role-name>APP_EPC</role-name>
        </auth-constraint>
        <user-data-constraint>
            <description>HTTPS</description>
            <transport-guarantee>CONFIDENTIAL</transport-guarantee>
        </user-data-constraint>
    </security-constraint>
    <login-config>
        <auth-method>FORM</auth-method>
        <realm-name>epcRealm</realm-name>
        <form-login-config>
            <form-login-page>/unauthenticated-redirect.jsp</form-login-page>
            <form-error-page>/unauthenticated-redirect.jsp</form-error-page>
        </form-login-config>
    </login-config>
    <security-role>
        <description/>
        <role-name>APP_EPC</role-name>
    </security-role>
</web-app>