Warning: SessionHandler::read(): Parent session handler is not open in...
Hi there! I recently switch my sessions from Pdo() to Redis(). For this I had to import the [this](https://github.com/drak/NativeSession) bundle into my project.

I didn't change anything in my Ratchet application and I'm still passing this line to WampServer:

```
$wampServer = new SessionProvider(new WampServer($applicationDispatcher), $this->getContainer()->get('session.handler'));
```

The Ratchet server runs fine but when I try to connect a user to it I see the following error on the console:

```
Mon, 02 Dec 2013 18:55:13   Warning: SessionHandler::read(): Parent session handler is not open in /Projects/Acme/vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/Session/Storage/Proxy/SessionHandlerProxy.php line 69
```

Any ideas if the problem is being caused by something in Ratchet? Or should I contact Drak and see if the problem is inside his NativeSession() bundle?

Regards
