Symfony2 error 500 instead of 404 at production

Question

In my Symfony2 project I\'m getting at development mode correct 404 Exception screen. But I\'m getting blank screen with HTTP status code 500 instead of 404 at production mo

Answer 1

In my case it was use of {% stylesheets %} tag in a 404 template, while TwigBundle was not included in the Assetic config.

Check your app/logs/prod.log, it should have an answer.

Answer 2

Here is how I redirect all non existent routes to root path. Put this route entry on the very bottom of your routing configuration. All existent route MUST be on top of it!

anything:
    path:     /{path}
    defaults:
        _controller: FrameworkBundle:Redirect:urlRedirect
        path: /
        permanent: true
    requirements:
        path: ".+"

reference:
http://symfony.com/doc/current/cookbook/routing/slash_in_parameter.html
http://symfony.com/doc/current/cookbook/routing/redirect_in_config.html

Answer 3

I encounteres that Symofny 3 throws an 500 error in production when you do not use

$this->createNotFoundException()

in your Controller.

throw Exception('message', 404)

works on dev-enviroment, but not on production.

Answer 4

ResourceNotFoundException is what the router throw when no route match the current request.

This can be a cache issue (80% of the time, it's the cache. Try rm -rf app/cache/* on your pre-production server). As the issue does not appear locally... (you tried the "prod" env locally right?).

You should also try to remove everything from your app/Resources/TwigBundle/views/Exception/error404.html.twig (is that the filename you use?) except simple HTML, to check if it's not a twig issue.

Answer 5

Another option is that you're trying to access the security token in the security context when no token is available.

Answer 6

Symfony\Component\Routing\Exception\ResourceNotFoundException means undefined route name. It looks like you've got somewhere in your error template {{ path('wrong_route') }}.