Could not find backup for factory javax.faces.context.FacesContextFactory

JSF startup issues

an 16, 2016 8:41:34 AM javax.faces.FactoryFinder$FactoryManager getFactory

SEVERE: Application was not properly initialized at startup, could not find Factory: javax.faces.context.FacesContextFactory. Attempting to find backup.

[WARNING] unavailable

java.lang.IllegalStateException: Could not find backup for factory javax.faces.context.FacesContextFactory.

Resolution
Add listener details in to your web.xml

<listener>

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

</listener>