My bootstrap:
$config = new Doctrine\ODM\MongoDB\Configuration();
$config->setProxyDir(APPLICATION_PATH . '/../data/cache');
$config->setProxyNamespace('Proxies');
$config->setDefaultDB([skip]);
$config->setHydratorDir(APPLICATION_PATH . '/../data/cache');
$config->setHydratorNamespace('Hydrators');
$config->setLoggerCallable(function(array $log) { print_r($log); });
$reader = new \Doctrine\Common\Annotations\AnnotationReader();
$reader->setDefaultAnnotationNamespace('Doctrine\ODM\MongoDB\Mapping\\');
$config->setMetadataDriverImpl(
new \Doctrine\ODM\MongoDB\Mapping\Driver\AnnotationDriver($reader, __DIR__ . '/Documents')
);
$manager = \Doctrine\ODM\MongoDB\DocumentManager::create(
new \Doctrine\MongoDB\Connection(),
$config
);
And nothing happens 
Trace from Doctrine\MongoDB\Configuration::getLoggerCallable():
#0 [skip]/Doctrine/MongoDB/Connection.php(248): Doctrine\MongoDB\Configuration->getLoggerCallable()
#1 [skip]/Doctrine/MongoDB/Connection.php(231): Doctrine\MongoDB\Connection->wrapDatabase(Object(MongoDB))
#2 [skip]/Doctrine/ODM/MongoDB/DocumentManager.php(287): Doctrine\MongoDB\Connection->selectDatabase([skip])
#3 [skip]/Doctrine/ODM/MongoDB/DocumentManager.php(316): Doctrine\ODM\MongoDB\DocumentManager->getDocumentDatabase('BPM\User')
#4 [skip]/Doctrine/ODM/MongoDB/Persisters/DocumentPersister.php(148): Doctrine\ODM\MongoDB\DocumentManager->getDocumentCollection('BPM\User')
#5 [skip]/Doctrine/ODM/MongoDB/UnitOfWork.php(319): Doctrine\ODM\MongoDB\Persisters\DocumentPersister->__construct(Object(Doctrine\ODM\MongoDB\Persisters\PersistenceBuilder), Object(Doctrine\ODM\MongoDB\DocumentManager), Object(Doctrine\Common\EventManager), Object(Doctrine\ODM\MongoDB\UnitOfWork), Object(Doctrine\ODM\MongoDB\Hydrator\HydratorFactory), Object(Doctrine\ODM\MongoDB\Mapping\ClassMetadata), '$')
#6 [skip]/Doctrine/ODM/MongoDB/DocumentRepository.php(115): Doctrine\ODM\MongoDB\UnitOfWork->getDocumentPersister('BPM\User')
#7 [skip]application/library/BPM/UserData.php(43): Doctrine\ODM\MongoDB\DocumentRepository->find('4dc9d0192d91365...')
[skip]
get_class($this) from Doctrine\MongoDB\Configuration::setLoggerCallable() write 'Doctrine\ODM\MongoDB\Configuration' like expected, but in getLoggerCallable() write 'Doctrine\MongoDB\Configuration'
Do you have any ideas about this behaviour?