Symfony2：自定义异常侦听器不工作env

Question

我已经做了一些自定义的异常侦听器，所以在数据库表中我有旧的url，现在是404错误和另一个用户应该重定向的网址，当它会到达旧的网址。问题是DEV环境下的一切工作正常，但是我有问题让它在PROD环境中工作（它引发503服务不可用错误）。

有人可能知道什么是错的吗？

services.yml：

services: 
    coupons.exception.action_listener: 
     class: Coupons\WebBundle\EventListener\ExceptionListener 
     arguments: [@service_container, @templating] 
     tags: 
      - { name: kernel.event_listener, event: kernel.exception, method: onKernelException } 

ExecptionListener：

namespace Coupons\WebBundle\EventListener; 

use Symfony\Component\DependencyInjection\ContainerInterface; 
use Symfony\Bundle\TwigBundle\TwigEngine; 
use Symfony\Component\HttpFoundation\RedirectResponse; 
use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent; 

class ExceptionListener 
{ 
    /** 
    * @var ContainerInterface 
    */ 
    protected $container; 

    /** 
    * @var TwigEngine 
    */ 
    protected $templating; 


    /** 
    * @param ContainerInterface $container 
    */ 
    public function __construct(ContainerInterface $container, TwigEngine $templating){ 
     // assign value(s) 
     $this->container = $container; 
     $this->templating = $templating; 
    } 

    /** 
    * 
    * @param GetResponseForExceptionEvent $event 
    */ 
    public function onKernelException(GetResponseForExceptionEvent $event) 
    { 
     // get exception 
     $exception = $event->getException(); 

     // get path 
     $path = $event->getRequest()->getPathInfo(); 
     $url = $event->getRequest()->getUri(); 

     $repository = $this->container->get('doctrine')->getRepository('CouponsWebBundle:SeoNotFound'); 


     $seonotfound = $repository->createQueryBuilder('s') 
      ->where('s.urlFrom LIKE :url') 
      ->andWhere('s.status = 1') 
      ->setParameter('url', $url.'%') 
      ->getQuery() 
      ->getOneOrNullResult(); 

     if($seonotfound != NULL){ 
      $event->setResponse(new RedirectResponse($seonotfound->getUrlTo(),$seonotfound->getRedirectType())); 
     } 

    } 
} 

Answer 1

也许你得到另一个异常在异常侦听器，检查symfony中的日志文件。