Error in v3.2-rc1 and HTTP cache in production

[nunocodex]

I have a small personal project made with the latest dev version but I found a bug with the http cache, this is my sources:

<?php

use Symfony\Component\HttpFoundation\Request;

/** @var \Composer\Autoload\ClassLoader $loader */

# Config autoload
$loader = require __DIR__ . '/../app/autoload.php';
include_once __DIR__ . '/../var/bootstrap.php.cache';

# Cache Loader
if (function_exists('apcu_fetch')) {
    $cache_loader = new \Symfony\Component\ClassLoader\ApcClassLoader(sha1(__DIR__), $loader);
    $cache_loader->register();
    $loader->unregister();
}

# Create kernel instance
$kernel = new MicroKernel('prod', false);
$kernel->loadClassCache();

# Create cache instance
$kernel = new MicroCache($kernel);

# Create request instance
$request = Request::createFromGlobals();

# Setup reverse proxy
Request::enableHttpMethodParameterOverride();
//Request::setTrustedProxies([ '127.0.0.1', $request->server->get('REMOTE_ADDR') ]);
//Request::setTrustedHeaderName(Request::HEADER_FORWARDED, null);

# Give response instance
$response = $kernel->handle($request);
$response->send();

# Bye!
$kernel->terminate($request, $response);

Kernel: https://github.com/nunopress/sf-micro-edition/blob/master/app/MicroKernel.php

If I use $kernel = new MicroCache($kernel); get error:

Cannot declare class Symfony\Component\HttpFoundation\ResponseHeaderBag, because the name is already in use in /var/www/html/var/cache/prod/classes.php on line 3942" while reading response header from upstream

If I enable the AppCache and disable $kernel->loadClassCache(); working but not all 2 in the same time.

For check if is my problem I downgraded to stable version 3.1 and all working fine as expected so I think the problem come with 3.2-rc1 (i not tested with the previous version).

php version:

PHP 7.0.8-0ubuntu0.16.04.3 (cli) ( NTS )
Copyright (c) 1997-2016 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2016 Zend Technologies
    with Zend OPcache v7.0.8-0ubuntu0.16.04.3, Copyright (c) 1999-2016, by Zend Technologies

If need more information's ask without problems. Sorry if isn't a good issue post, it's the first time i post one issue for symfony.

[nicolas-grekas]

Can you check where the ResponseHeaderBag class is loaded from the first time? bootstrap.php.cache? Autoloading somewhere (where then?)

[nunocodex]

Hi, after investigate more in depth I see the problem come with the file response, you can found my project here: https://github.com/nunopress/sharex-hosting-uploader

The problem working with export SYMFONY_ENV=prod and use the app.php file when you try to see a files (after cache created) with return $this->file($file, $filename, 'inline'); : https://files.nunopress.com/view/21-11-2016-1479725953.png

I tried too with return new BinaryFileResponse($file, 200); but the problem still.

[nunocodex]

Ok I think the problem come with composer dump-autoload --optimize because with the latest dev-master without run this command the app working fine in production, but when use this the problem writed here come back. I don't know why on the v3.1.7 (updated now) working fine with composer optimize and with v3.2 not working ...

[rodush]

I observe similar issue in production (Heroku), when using latest 3.2 (which is released, right?)
Can reproduce it locally as well. Experimented, found out that if I comment out this string
include_once __DIR__ . '/../var/bootstrap.php.cache'; in app.php file, it works fine.
This is strange that issue is not reported yet...
Update:
in my case the error a bit different -

[Fri Dec 02 23:53:10.237860 2016] [:error] [pid 8796] [client 33.33.33.1:60565] PHP Fatal error: Cannot declare interface Symfony\Component\HttpKernel\HttpKernelInterface, because the name is already in use in /var/www/frontier/var/bootstrap.php.cache on line 1309

[eventhorizonpl]

I've got a similar problem
2016/12/12 17:07:40 [error] 17795#17795: *725 FastCGI sent in stderr: "PHP message: PHP Fatal error: Cannot declare class Symfony\Component\HttpFoundation\Response, be cause the name is already in use in /var/www/prod.test.dk/var/cache/prod/classes.php on line 3777" while reading response header from upstream, client: 89.1 88.72.143, server: test.dk, request: "GET / HTTP/1.0", upstream: "fastcgi://unix:/var/run/php-fpm/php7-fpm.sock:", host: "www.test.dk"

[stof]

@namaless @rodush As a workaround, I suggest you to remove the call to ->loadClassCache. We found out that this class cache was not necessary on PHP 7.
It does not bring any benefit compared to PHP 7 + OPCache + composer optimized autoloader (and can even have a negative impact).

[araines]

@stof out of interest do you know what kind of performance impact that might have running PHP5.6? I've hit this same issue, but unfortunately haven't got a PHP7 compatible system (yet).

[raress96]

I have exactly the same problem as the OP.If I downgrade to Symfony 3.1.x it works perfectly without changing the code, so the problem is definitely in Symfony 3.2.x.I upgraded to 3.2.1 but the problem is still there.I am running PHP 7 with OPCache enabled and the default app.php file with the app cache kernel enabled.
I have this error:
PHP Fatal error: Cannot declare class Symfony\\Component\\HttpFoundation\\Response, because the name is already in use in /home/rares.serban/Sites/site.welpe/var/cache/prod/classes.php on line 377