I also had the same issue, but with Symfony 2.4 with the following inside my composer.json file:
"symfony/symfony": "~2.4",
"doctrine/orm": ">=2.2.3,<2.4-dev",
"doctrine/doctrine-bundle": "~1.2",
"doctrine/doctrine-migrations-bundle" : "dev-master",
"doctrine/doctrine-fixtures-bundle" : "dev-master",
2.4.1 Doctrine ORM, , Github :
( ). "master" . , ORC Doctrine , "master" :
"symfony/symfony": "~2.4",
"doctrine/orm": "dev-master",
"doctrine/doctrine-bundle": "~1.2",
"doctrine/doctrine-migrations-bundle" : "dev-master",
"doctrine/doctrine-fixtures-bundle" : "dev-master",
: . /composer.phar update doctrine/orm