Additional uncaught exception thrown while handling exception.

Original

PDOException: SQLSTATE[HY000] [1040] Too many connections in drupal_is_denied() (line 2193 of /var/www/html/websites/drupal/master/includes/bootstrap.inc).

Additional

PDOException: SQLSTATE[HY000] [1040] Too many connections in _registry_check_code() (line 3486 of /var/www/html/websites/drupal/master/includes/bootstrap.inc).