https://bugzilla.redhat.com/show_bug.cgi?id=1163812
--- Comment #5 from Paul Wouters pwouters@redhat.com --- my problem was that I ended up with /etc/ejabberd/ejabberd.cfg.rpmnew and /etc/ejabberd/ejabberd.cfg.rpmsave without leaving any /etc/ejabberd/ejabberd.cfg
I copied my rpmsave back and then ejabberd started working again.