Additional uncaught exception thrown while handling exception.

Original

PDOException: SQLSTATE[HY000] [1040] Too many connections in _registry_check_code() (line 3198 of /var/www/drupal/c3/includes/bootstrap.inc).

Additional

PDOException: SQLSTATE[HY000] [1040] Too many connections in _registry_check_code() (line 3198 of /var/www/drupal/c3/includes/bootstrap.inc).