Session expires even if I'm working, session lifetime, Ajax and Symfony2

Question

I have configured my application for close session on timeout if user do nothing during 10 minutes period. At `config.yml` I have this: ``` session: handler_id: ~ cookie_lifetime: 600 # 10 minutes gc_maxlifetime: 600 # 10 minutes gc_probability: 1 gc_divisor: 1 ``` I do a Ajax call every one minute to check if session will be close to expire or doesn't and this is what I check: ``` public function isLoggedInAction(Request $request) { $response = array(); $response['authenticated'] = FALSE; $status = 200; $securityContext = $this->container->get('security.context'); if ($securityContext->isGranted('IS_AUTHENTICATED_FULLY')) { $response['authenticated'] = TRUE; } return new JsonResponse($response, $status ?: 200); } ``` For some unknow reason is not working and every 10 minutes session is closed whether I'm working with page or doesn't, why? I'm missing something? Edit 1 Tried new values, still not working: ``` session: handler_id: ~ cookie_lifetime: 1800 gc_maxlifetime: 600 gc_probabil…

Accepted Answer

First, watch out your `gc_probability` and `gc_divisor`. If both are set to one, that means that the probability that the garbage collector (GC) process is started on every session initialization is `gc_probability / gc_divisor = 1/1 = 1` (100%).

You could leave it to the defaults or give it a higher number in order to reduce the chance of the GC being called.

For instance:

```
session:
        # handler_id set to null will use default session handler from php.ini
        handler_id:  ~
        cookie_lifetime: 600 # Ten minutes
        gc_probability: 1
        gc_divisor: 10000
```

Also, if you're using a Virtual Machine, check the date of your server, the resulting session cookie will be stamped with an expiry time of `time() + cookie_lifetime` where the time is taken from the server.

It could be possible that, if the server had a bad date, the cookie would expire inmediately. Imagine: server date `2015-01-31`, your browser `2015-02-01`. Server sends cookie that expires on `2015-01-31` at 11pm, your browser receives a cookie with an expiration date that has already passed.

Session expires even if I'm working, session lifetime, Ajax and Symfony2

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