Symfony 2.7 / 3 - Doctrine: You have requested a non-existent service "fos_user.doctrine_registry"
Issue created here: https://github.com/FriendsOfSymfony/FOSUserBundle/issues/2048
Short term fix (worked for me Symfony 3.0.* ) :
services: fos_user.doctrine_registry: alias: doctrine
My solution work like a charm... All works with huge mongo dataset
FIX For MongoDB using ODM:
# FIX doctrine registry service for 3.0 and 2.8 sf versionfos_user.doctrine_registry: alias: doctrine_mongodb