ClassNotFoundException from jboss module to application class.

Issue

• In a web application, the commons-lang for cloning using SerializationUtils.clone(Object) is used.
• In jboss-deployment-structure.xml, added the below in dependencies.

<module name="org.apache.commons.lang"/>

• When trying to invoke SerializationUtils.clone for one of the classes which is present in a jar inside WEB-INF/lib, getting the following below Exception.

java.lang.ClassNotFoundException: from [Module "org.apache.commons.lang:main" from local module loader @18acf07 (finder: local module finder @1de2b1 (roots: $JBOSS_HOME\modules\system\layers\base))].

• While going through the list of jsf modules, it is found that, the jsf impl module is itself is private.

<module xmlns="urn:jboss:module:1.1" name="com.sun.jsf-impl">
    <properties>
        <property name="jboss.api" value="private"/>
    </properties>

    <dependencies>
        <module name="javax.faces.api"/>
        <module name="javaee.api"/>
        <module name="javax.servlet.jstl.api"/>
        <module name="org.apache.xerces" services="import"/>
        <module name="org.apache.xalan" services="import"/>
    </dependencies>

    <resources>
        <resource-root path="jsf-impl-2.1.19-redhat-1.jar"/>
        <!-- Insert resources here -->
    </resources>
</module>