Additional uncaught exception thrown while handling exception.

Original

PDOException: SQLSTATE[HY000] [1040] Too many connections in drupal_is_denied() (line 1923 of /mnt/gb5/htdocs/drupal7.mingluji.com/includes/bootstrap.inc).

Additional

PDOException: SQLSTATE[HY000] [1040] Too many connections in dblog_watchdog() (line 147 of /mnt/gb5/htdocs/drupal7.mingluji.com/modules/dblog/dblog.module).