Failed to start the session because headers have already been sent by "/var/www/html/src/AppBundle/Controller/SearchController.php" at line 1227.

Stack Trace

1. in app/cache/prod/classes.php at line 120 
   117. throw new \RuntimeException('Failed to start the session: already started by PHP ($_SESSION is set).');
   118. }
   119. if (ini_get('session.use_cookies') && headers_sent($file, $line)) {
   120. throw new \RuntimeException(sprintf('Failed to start the session because headers have already been sent by "%s" at line %d.', $file, $line));
   121. }
   122. if (!session_start()) {
   123. throw new \RuntimeException('Failed to start the session');
2. at NativeSessionStorage ->start ()
   in app/cache/prod/classes.php at line 498 
   495. }
   496. public function start()
   497. {
   498. return $this->storage->start();
   499. }
   500. public function has($name)
   501. {
3. at Session ->start ()
   in vendor/symfony/symfony/src/Symfony/Component/Security/Csrf/TokenStorage/SessionTokenStorage.php at line 78 
   75.     public function hasToken($tokenId)
   76.     {
   77.         if (!$this->session->isStarted()) {
   78.             $this->session->start();
   79.         }
   81.         return $this->session->has($this->namespace.'/'.$tokenId);
4. at SessionTokenStorage ->hasToken ('form')
   in vendor/symfony/symfony/src/Symfony/Component/Security/Csrf/CsrfTokenManager.php at line 72 
   69.     public function getToken($tokenId)
   70.     {
   71.         $namespacedId = $this->getNamespace().$tokenId;
   72.         if ($this->storage->hasToken($namespacedId)) {
   73.             $value = $this->storage->getToken($namespacedId);
   74.         } else {
   75.             $value = $this->generator->generateToken();
5. at CsrfTokenManager ->getToken ('form')
   in vendor/symfony/symfony/src/Symfony/Component/Form/Extension/Csrf/Type/FormTypeCsrfExtension.php at line 106 
   103.         if ($options['csrf_protection'] && !$view->parent && $options['compound']) {
   104.             $factory = $form->getConfig()->getFormFactory();
   105.             $tokenId = $options['csrf_token_id'] ?: ($form->getName() ?: get_class($form->getConfig()->getType()->getInnerType()));
   106.             $data = (string) $options['csrf_token_manager']->getToken($tokenId);
   108.             $csrfForm = $factory->createNamed($options['csrf_field_name'], 'Symfony\Component\Form\Extension\Core\Type\HiddenType', $data, array(
   109.                 'mapped' => false,
6. at FormTypeCsrfExtension ->finishView (object(FormView), object(Form), array('block_name' => null, 'disabled' => false, 'label' => null, 'label_format' => null, 'translation_domain' => null, 'auto_initialize' => true, 'trim' => true, 'required' => true, 'max_length' => null, 'pattern' => null, 'property_path' => null, 'mapped' => true, 'by_reference' => true, 'virtual' => null, 'compound' => true, 'method' => 'POST', 'action' => '', 'post_max_size_message' => 'The uploaded file was too large. Please try to upload a smaller file.', 'error_mapping' => array(), 'invalid_message' => 'This value is not valid.', 'invalid_message_parameters' => array(), 'allow_extra_fields' => false, 'extra_fields_message' => 'This form should not contain extra fields.', 'csrf_protection' => true, 'csrf_field_name' => '_token', 'csrf_message' => 'The CSRF token is invalid. Please try to resubmit the form.', 'intention' => null, 'read_only' => false, 'attr' => array(), 'data_class' => null, 'empty_data' => object(Closure), 'error_bubbling' => true, 'label_attr' => array(), 'inherit_data' => false, 'upload_max_size_message' => object(Closure), 'validation_groups' => null, 'constraints' => array(), 'cascade_validation' => false, 'csrf_provider' => object(CsrfTokenManager), 'csrf_token_manager' => object(CsrfTokenManager), 'csrf_token_id' => null))
   in vendor/symfony/symfony/src/Symfony/Component/Form/ResolvedFormType.php at line 235 
   233.         foreach ($this->typeExtensions as $extension) {
   234.             /* @var FormTypeExtensionInterface $extension */
   235.             $extension->finishView($view, $form, $options);
   236.         }
   237.     }
7. at ResolvedFormType ->finishView (object(FormView), object(Form), array('block_name' => null, 'disabled' => false, 'label' => null, 'label_format' => null, 'translation_domain' => null, 'auto_initialize' => true, 'trim' => true, 'required' => true, 'max_length' => null, 'pattern' => null, 'property_path' => null, 'mapped' => true, 'by_reference' => true, 'virtual' => null, 'compound' => true, 'method' => 'POST', 'action' => '', 'post_max_size_message' => 'The uploaded file was too large. Please try to upload a smaller file.', 'error_mapping' => array(), 'invalid_message' => 'This value is not valid.', 'invalid_message_parameters' => array(), 'allow_extra_fields' => false, 'extra_fields_message' => 'This form should not contain extra fields.', 'csrf_protection' => true, 'csrf_field_name' => '_token', 'csrf_message' => 'The CSRF token is invalid. Please try to resubmit the form.', 'intention' => null, 'read_only' => false, 'attr' => array(), 'data_class' => null, 'empty_data' => object(Closure), 'error_bubbling' => true, 'label_attr' => array(), 'inherit_data' => false, 'upload_max_size_message' => object(Closure), 'validation_groups' => null, 'constraints' => array(), 'cascade_validation' => false, 'csrf_provider' => object(CsrfTokenManager), 'csrf_token_manager' => object(CsrfTokenManager), 'csrf_token_id' => null))
   in vendor/symfony/symfony/src/Symfony/Component/Form/Extension/DataCollector/Proxy/ResolvedTypeDataCollectorProxy.php at line 119 
   116.      */
   117.     public function finishView(FormView $view, FormInterface $form, array $options)
   118.     {
   119.         $this->proxiedType->finishView($view, $form, $options);
   121.         // Remember which view belongs to which form instance, so that we can
   122.         // get the collected data for a view when its form instance is not
8. at ResolvedTypeDataCollectorProxy ->finishView (object(FormView), object(Form), array('block_name' => null, 'disabled' => false, 'label' => null, 'label_format' => null, 'translation_domain' => null, 'auto_initialize' => true, 'trim' => true, 'required' => true, 'max_length' => null, 'pattern' => null, 'property_path' => null, 'mapped' => true, 'by_reference' => true, 'virtual' => null, 'compound' => true, 'method' => 'POST', 'action' => '', 'post_max_size_message' => 'The uploaded file was too large. Please try to upload a smaller file.', 'error_mapping' => array(), 'invalid_message' => 'This value is not valid.', 'invalid_message_parameters' => array(), 'allow_extra_fields' => false, 'extra_fields_message' => 'This form should not contain extra fields.', 'csrf_protection' => true, 'csrf_field_name' => '_token', 'csrf_message' => 'The CSRF token is invalid. Please try to resubmit the form.', 'intention' => null, 'read_only' => false, 'attr' => array(), 'data_class' => null, 'empty_data' => object(Closure), 'error_bubbling' => true, 'label_attr' => array(), 'inherit_data' => false, 'upload_max_size_message' => object(Closure), 'validation_groups' => null, 'constraints' => array(), 'cascade_validation' => false, 'csrf_provider' => object(CsrfTokenManager), 'csrf_token_manager' => object(CsrfTokenManager), 'csrf_token_id' => null))
   in vendor/symfony/symfony/src/Symfony/Component/Form/Form.php at line 1075 
   1072.             $view->children[$name] = $child->createView($view);
   1073.         }
   1075.         $type->finishView($view, $this, $options);
   1077.         return $view;
   1078.     }
9. at Form ->createView ()
   in src/AppBundle/Controller/SearchController.php at line 115 
   112.         $form->handleRequest($request);
   114.         return $this->render('search_result.html.twig', array(
   115.                 'form' => $form->createView(),
   116.                 'json' => $json,
   117.                 'annotation_types' => $annotation_types,
   118.                 'annotation_types_array' => $annotation_types_array,
10. at SearchController ->searchAction ('no_search', object(Request))
    in app/bootstrap.php.cache at line 3276 
    3273. $this->dispatcher->dispatch(KernelEvents::CONTROLLER, $event);
    3274. $controller = $event->getController();
    3275. $arguments = $this->resolver->getArguments($request, $controller);
    3276. $response = \call_user_func_array($controller, $arguments);
    3277. if (!$response instanceof Response) {
    3278. $event = new GetResponseForControllerResultEvent($this, $request, $type, $response);
    3279. $this->dispatcher->dispatch(KernelEvents::VIEW, $event);
11. at HttpKernel ->handleRaw (object(Request), '1')
    in app/bootstrap.php.cache at line 3235 
    3232. {
    3233. $request->headers->set('X-Php-Ob-Level', ob_get_level());
    3234. try {
    3235. return $this->handleRaw($request, $type);
    3236. } catch (\Exception $e) {
    3237. if ($e instanceof ConflictingHeadersException) {
    3238. $e = new BadRequestHttpException('The request headers contain conflicting information regarding the origin of this request.', $e);
12. at HttpKernel ->handle (object(Request), '1', true)
    in app/bootstrap.php.cache at line 3389 
    3386. $this->container->enterScope('request');
    3387. $this->container->set('request', $request,'request');
    3388. try {
    3389. $response = parent::handle($request, $type, $catch);
    3390. } catch (\Exception $e) {
    3391. $this->container->set('request', null,'request');
    3392. $this->container->leaveScope('request');
13. at ContainerAwareHttpKernel ->handle (object(Request), '1', true)
    in app/bootstrap.php.cache at line 2594 
    2591. if (false === $this->booted) {
    2592. $this->boot();
    2593. }
    2594. return $this->getHttpKernel()->handle($request, $type, $catch);
    2595. }
    2596. protected function getHttpKernel()
    2597. {
14. at Kernel ->handle (object(Request))
    in web/app.php at line 19 
    16. // When using the HttpCache, you need to call the method in your front controller instead of relying on the configuration parameter
    17. //Request::enableHttpMethodParameterOverride();
    18. $request = Request::createFromGlobals();
    19. $response = $kernel->handle($request);
    20. $response->send();
    21. $kernel->terminate($request, $response);

Stack Trace (Plain Text) 

[1] RuntimeException: Failed to start the session because headers have already been sent by "/var/www/html/src/AppBundle/Controller/SearchController.php" at line 1227.
    at n/a
        in /var/www/html/app/cache/prod/classes.php line 120

    at Symfony\Component\HttpFoundation\Session\Storage\NativeSessionStorage->start()
        in /var/www/html/app/cache/prod/classes.php line 498

    at Symfony\Component\HttpFoundation\Session\Session->start()
        in /var/www/html/vendor/symfony/symfony/src/Symfony/Component/Security/Csrf/TokenStorage/SessionTokenStorage.php line 78

    at Symfony\Component\Security\Csrf\TokenStorage\SessionTokenStorage->hasToken('form')
        in /var/www/html/vendor/symfony/symfony/src/Symfony/Component/Security/Csrf/CsrfTokenManager.php line 72

    at Symfony\Component\Security\Csrf\CsrfTokenManager->getToken('form')
        in /var/www/html/vendor/symfony/symfony/src/Symfony/Component/Form/Extension/Csrf/Type/FormTypeCsrfExtension.php line 106

    at Symfony\Component\Form\Extension\Csrf\Type\FormTypeCsrfExtension->finishView(object(FormView), object(Form), array('block_name' => null, 'disabled' => false, 'label' => null, 'label_format' => null, 'translation_domain' => null, 'auto_initialize' => true, 'trim' => true, 'required' => true, 'max_length' => null, 'pattern' => null, 'property_path' => null, 'mapped' => true, 'by_reference' => true, 'virtual' => null, 'compound' => true, 'method' => 'POST', 'action' => '', 'post_max_size_message' => 'The uploaded file was too large. Please try to upload a smaller file.', 'error_mapping' => array(), 'invalid_message' => 'This value is not valid.', 'invalid_message_parameters' => array(), 'allow_extra_fields' => false, 'extra_fields_message' => 'This form should not contain extra fields.', 'csrf_protection' => true, 'csrf_field_name' => '_token', 'csrf_message' => 'The CSRF token is invalid. Please try to resubmit the form.', 'intention' => null, 'read_only' => false, 'attr' => array(), 'data_class' => null, 'empty_data' => object(Closure), 'error_bubbling' => true, 'label_attr' => array(), 'inherit_data' => false, 'upload_max_size_message' => object(Closure), 'validation_groups' => null, 'constraints' => array(), 'cascade_validation' => false, 'csrf_provider' => object(CsrfTokenManager), 'csrf_token_manager' => object(CsrfTokenManager), 'csrf_token_id' => null))
        in /var/www/html/vendor/symfony/symfony/src/Symfony/Component/Form/ResolvedFormType.php line 235

    at Symfony\Component\Form\ResolvedFormType->finishView(object(FormView), object(Form), array('block_name' => null, 'disabled' => false, 'label' => null, 'label_format' => null, 'translation_domain' => null, 'auto_initialize' => true, 'trim' => true, 'required' => true, 'max_length' => null, 'pattern' => null, 'property_path' => null, 'mapped' => true, 'by_reference' => true, 'virtual' => null, 'compound' => true, 'method' => 'POST', 'action' => '', 'post_max_size_message' => 'The uploaded file was too large. Please try to upload a smaller file.', 'error_mapping' => array(), 'invalid_message' => 'This value is not valid.', 'invalid_message_parameters' => array(), 'allow_extra_fields' => false, 'extra_fields_message' => 'This form should not contain extra fields.', 'csrf_protection' => true, 'csrf_field_name' => '_token', 'csrf_message' => 'The CSRF token is invalid. Please try to resubmit the form.', 'intention' => null, 'read_only' => false, 'attr' => array(), 'data_class' => null, 'empty_data' => object(Closure), 'error_bubbling' => true, 'label_attr' => array(), 'inherit_data' => false, 'upload_max_size_message' => object(Closure), 'validation_groups' => null, 'constraints' => array(), 'cascade_validation' => false, 'csrf_provider' => object(CsrfTokenManager), 'csrf_token_manager' => object(CsrfTokenManager), 'csrf_token_id' => null))
        in /var/www/html/vendor/symfony/symfony/src/Symfony/Component/Form/Extension/DataCollector/Proxy/ResolvedTypeDataCollectorProxy.php line 119

    at Symfony\Component\Form\Extension\DataCollector\Proxy\ResolvedTypeDataCollectorProxy->finishView(object(FormView), object(Form), array('block_name' => null, 'disabled' => false, 'label' => null, 'label_format' => null, 'translation_domain' => null, 'auto_initialize' => true, 'trim' => true, 'required' => true, 'max_length' => null, 'pattern' => null, 'property_path' => null, 'mapped' => true, 'by_reference' => true, 'virtual' => null, 'compound' => true, 'method' => 'POST', 'action' => '', 'post_max_size_message' => 'The uploaded file was too large. Please try to upload a smaller file.', 'error_mapping' => array(), 'invalid_message' => 'This value is not valid.', 'invalid_message_parameters' => array(), 'allow_extra_fields' => false, 'extra_fields_message' => 'This form should not contain extra fields.', 'csrf_protection' => true, 'csrf_field_name' => '_token', 'csrf_message' => 'The CSRF token is invalid. Please try to resubmit the form.', 'intention' => null, 'read_only' => false, 'attr' => array(), 'data_class' => null, 'empty_data' => object(Closure), 'error_bubbling' => true, 'label_attr' => array(), 'inherit_data' => false, 'upload_max_size_message' => object(Closure), 'validation_groups' => null, 'constraints' => array(), 'cascade_validation' => false, 'csrf_provider' => object(CsrfTokenManager), 'csrf_token_manager' => object(CsrfTokenManager), 'csrf_token_id' => null))
        in /var/www/html/vendor/symfony/symfony/src/Symfony/Component/Form/Form.php line 1075

    at Symfony\Component\Form\Form->createView()
        in /var/www/html/src/AppBundle/Controller/SearchController.php line 115

    at AppBundle\Controller\SearchController->searchAction('no_search', object(Request))
        in /var/www/html/app/bootstrap.php.cache line 3276

    at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Request), '1')
        in /var/www/html/app/bootstrap.php.cache line 3235

    at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), '1', true)
        in /var/www/html/app/bootstrap.php.cache line 3389

    at Symfony\Component\HttpKernel\DependencyInjection\ContainerAwareHttpKernel->handle(object(Request), '1', true)
        in /var/www/html/app/bootstrap.php.cache line 2594

    at Symfony\Component\HttpKernel\Kernel->handle(object(Request))
        in /var/www/html/web/app.php line 19