Description When set to true declare that session can’t be used during handling of request. Generates Exception if route tries to use the session. Syntax // src/Controller/MainController.php namespace App\Controller; use Symfony\Bundle\FrameworkBundle\Controller\AbstractController; use Symfony\Component\Routing\Annotation\Route; class MainController extends AbstractController { /** * @Route("/", name="homepage", stateless=true) */ public function homepage() { // ... } }