Jira issue originally created by user digitalmechanic:

On line 56 of the file ./vendor/doctrine-dbal/lib/Doctrine/DBAL/Driver/PDOOracle/Driver.php:

The line reads:
$dsn .= '))(CONNECT_DATA=(SID=' . $params['dbname'] . ')))'; should read $dsn .= '))(CONNECT_DATA=(SERVICE_NAME=' . $params['dbname'] . ')))';

If both SID and SERVICE_NAME need to be available for use, then logic should be inserted to determine which method is being used.