Subscribtion to FOSUserEvents::REGISTRATION_COMPLETED is running twice - symfony

Question

In symfony 3 I have subscribed to
FOSUserEvents::REGISTRATION_COMPLETED
to fill a second table with address data and writing a log.
namespace AppBundle\EventListener;
use AppBundle\Entity\Address;
use Doctrine\ORM\EntityManager;
use Psr\Container\ContainerInterface;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use FOS\UserBundle\FOSUserEvents;
use FOS\UserBundle\Event\FilterUserResponseEvent;
class RegistrationSubscriber implements EventSubscriberInterface
{
private $em;
private $container;
public function __construct(EntityManager $em,ContainerInterface $container)
{
$this->em = $em;
$this->container = $container;
}
public static function getSubscribedEvents()
{
return [
FOSUserEvents::REGISTRATION_COMPLETED => [
['onRegistrationCompleted',0]
],
];
}
public function onRegistrationCompleted(FilterUserResponseEvent $event)
{
$user = $event->getUser();
$address = new Address();
$address->addAddress($user);
$this->em->persist($address);
$this->em->flush();
$this->container->get('app.logging')->write('Anmeldung',array('customer'=>$user->getId()));
}
}
services.yml:
app.registration_listener:
class: 'AppBundle\EventListener\RegistrationSubscriber'
arguments: ['#doctrine.orm.entity_manager']
tags:
- { name: kernel.event_subscriber}
app.logging:
class: AppBundle\Util\LogHandler
arguments: ['#doctrine.orm.entity_manager']
public: true
After submitting the registration form, FOSUserEvents::REGISTRATION_COMPLETED is triggered, but it is running twice, because address data and log data are written twice.
What can be the reason ?

Answer 1

I found it by myself.
In services.yml of symfony 3.3 I used the option
autoconfigure: true,
so services and event subscribers are loaded automatically.
That is why the event was triggered twice.