symfony 2 No route found for "GET /"

Question

Symfony2 returns No route found for "GET /" when I try to run http://localhost/app_dev.php, but this url works: http://localhost/app_dev.php/hello/Symfony. I removed AcmeDemoBundle and I'm trying to run an example bundle from a symfony2 tutorial. What is wrong ?

app/config/routing.yml :

ShopMyShopBundle:
resource: "@ShopMyShopBundle/Resources/config/routing.yml"
prefix:   /

app/config/routing_dev.yml :

_assetic:
resource: .
type:     assetic

_wdt:
resource: "@WebProfilerBundle/Resources/config/routing/wdt.xml"
prefix:   /_wdt

_profiler:
resource: "@WebProfilerBundle/Resources/config/routing/profiler.xml"
prefix:   /_profiler

_configurator:
resource: "@SensioDistributionBundle/Resources/config/routing/webconfigurator.xml"
prefix:   /_configurator

_main:
resource: routing.yml

src/Shop/MyShopBundle/Resources/config/routing.yml :

ShopMyShopBundle_homepage:
pattern:  /hello/{name}
defaults: { _controller: ShopMyShopBundle:Main:index }
requirements:
    _method:  GET

Answer 1

The problem is that you don't have a route for /. Change your definition to this:

ShopMyShopBundle_homepage:     pattern:  /     defaults: { _controller: ShopMyShopBundle:Main:index }     requirements:         _method:  GET 

Answer 2

The above answers are wrong, respectively aren't answering why you're having troubles viewing the demo-content prod-mode.

Here's the correct answer: clear your "prod"-cache:

php app/console cache:clear --env prod 

Answer 3

This work for me:

cache:clear --env=prod