Fatal error: Uncaught PDOException: SQLSTATE[HY000] [1040] Too many connections in /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php:43 Stack trace: #0 /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php(43): PDO->__construct('mysql:host=dba_...', 'admin', '2510', Array) #1 /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOMySql/Driver.php(44): Doctrine\DBAL\Driver\PDOConnection->__construct('mysql:host=dba_...', 'admin', '2510', Array) #2 /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(372): Doctrine\DBAL\Driver\PDOMySql\Driver->connect(Array, 'admin', '2510', Array) #3 /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(432): Doctrine\DBAL\Connection->connect() #4 /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(396): Doctrine\DBAL\Connection->getDatabasePlatformVersion() #5 /var/www/html/vendor/doctrine/dbal/lib/Doctrine/DBAL/Connection.php(338): Doctrine\DBAL\Connection->detectDatabasePlatform() #6 in /var/www/html/vendor/zendframework/zend-servicemanager/src/ServiceManager.php on line 1135