publish failure

publishfailure.js

    function rePublish() {
        session.unpublish(publisher);
        publisher.destroy();

        publisher = OT.initPublisher();
        session.publish(publisher, function(err) {
            if (err) {
                console.log(err);
            } else {
                console.log('republish');
            }

        });

        console.log('switched camera');
    }