Additional uncaught exception thrown while handling exception.

Original

PDOException: SQLSTATE[HY000] [1040] Too many connections in db_select() (line 2640 of /data/www/drupal/includes/database/database.inc).

Additional

PDOException: SQLSTATE[HY000] [1040] Too many connections in db_select() (line 2640 of /data/www/drupal/includes/database/database.inc).