Additional uncaught exception thrown while handling exception.

Original

PDOException: SQLSTATE[HY000] [1040] Too many connections in drupal_is_denied() (line 1921 of /usr/share/drupal/includes/bootstrap.inc).

Additional

PDOException: SQLSTATE[HY000] [1040] Too many connections in dblog_watchdog() (line 147 of /usr/share/drupal/modules/dblog/dblog.module).