Symfony2 nginx自动注销

Question

I have a project in Symfony 2 (nginx, MySQL).

I looked at nginx access.log file and found something very interesting.

It appears that I get automatic route calling from my application.

This Is my access.log:

10.15.4.104 - - [18/Jun/2016:09:32:52 +0200] "GET /logout HTTP/1.1" 302

10.15.4.104 - - [18/Jun/2016:09:32:52 +0200] "GET /login HTTP/1.1" 200

It seems that in the same second, two routes get called (logout and then in the same second /login).

I am using FOSUserBundle.

This is my part of my config.yml

translator:      { fallbacks: ["%locale%"] }
secret:          "%secret%"
router:
    resource: "%kernel.root_dir%/config/routing.yml"
    strict_requirements: ~
form:            ~
csrf_protection: ~
validation:      { enable_annotations: true }
#serializer:      { enable_annotations: true }
templating:
    engines: ['twig']
    #assets_version: SomeVersionScheme
default_locale:  "%locale%"
trusted_hosts:   ~
trusted_proxies: ~
session:
    # handler_id set to null will use default session handler from php.ini
    handler_id:  ~
    gc_probability: 0
fragments:       ~
http_method_override: true