LoginFailureHandler.php

    /**
     * 
     * @param Request $request
     * @param AuthenticationException $exception
     * @return \Symfony\Component\HttpFoundation\RedirectResponse
     */
    public function onAuthenticationFailure(Request $request, AuthenticationException $exception)
    {
        $data = $request->request->All('_username');
        $username = $data['_username'];
        $user = $this->em->getRepository('DataBundle:User')->findOneByEmail($username);
        if ($user) {
            $this->container->get('session')->getFlashBag()->add(
                'error',
                'Incorrect email or password.'
            );
            $defense = $user->getDefense();
            if ($defense) {
                $defense->addAttempt();
            } else {
                $defense = new LoginDefense();
                //$user->setDefense($defense);
                $defense->setUser($user);
            }
            $this->em->persist($defense);
            $this->em->flush();
        } else {
            $this->container->get('session')->getFlashBag()->add(
                'error',
                sprintf('No user with email "%s" was found.', $username)
            );
        }
        $url = $this->container->get('router')->generate('fos_user_security_login');
        return new RedirectResponse($url);
    }