Fatal error: Uncaught RedisException: read error on connection to redis-master:6379 in /var/www/html/vendor/snc/redis-bundle/Factory/PhpredisClientFactory.php:176 Stack trace: #0 /var/www/html/vendor/snc/redis-bundle/Factory/PhpredisClientFactory.php(176): Redis->select(15) #1 /var/www/html/vendor/snc/redis-bundle/Factory/PhpredisClientFactory.php(65): Snc\RedisBundle\Factory\PhpredisClientFactory->createClient(Object(Snc\RedisBundle\DependencyInjection\Configuration\RedisDsn), 'Redis', 'session', Array) #2 /var/www/html/app/cache/prod/ContainerC5mnni0/appProdProjectContainer.php(2042): Snc\RedisBundle\Factory\PhpredisClientFactory->create('Redis', Array, Array, 'session') #3 /var/www/html/app/cache/prod/ContainerC5mnni0/appProdProjectContainer.php(2052): ContainerC5mnni0\appProdProjectContainer->getSncRedis_Session_ClientService() #4 /var/www/html/app/cache/prod/ContainerC5mnni0/appProdProjectContainer.php(2010): ContainerC5mnni0\appProdProjectContainer->getSncRedis_Session_HandlerService() #5 /var/www/html/app/cache/pro in /var/www/html/app/cache/prod/ContainerC5mnni0/appProdProjectContainer.php on line 996