yii\mutex\OracleMutex::init PHP Method

    public function init()
    {
        parent::init();
        if (strpos($this->db->driverName, 'oci') !== 0 && strpos($this->db->driverName, 'odbc') !== 0) {
            throw new InvalidConfigException('In order to use OracleMutex connection must be configured to use Oracle database.');
        }
    }