Reproduce: Send session configuration to Zend_Application like this:

$application = new Zend_Application(
    APPLICATION_ENVIRONMENT,
    array(
        'resources' => array(
            'session' => array(
                'saveHandler' => array(
                    'class' => 'Zend_Session_SaveHandler_DbTable',
                    'options' => array(
                        'name' => 'session',
                        'primary' => 'id',
                        'modifiedColumn' => 'modified',
                        'dataColumn' => 'data',
                        'lifetimeColumn' => 'lifetime',
                    ),
                ),
            ),
        ),
    )
);

Throws an Exception: Zend_Session_Exception: Unknown option: savehandler = Array in Zend\Session.php on line 220