[support] Drupal 7

Hi All Could you please give me solution for this issues: Error The website encountered an unexpected error. Please try again later. Error message *PDOException*: SQLSTATE[42000] [1203] User retailp1_drupal already has more than 'max_user_connections' active connections in * lock_may_be_available()* (line *167* of* /home1/retailp1/public_html/newsite/includes/lock.inc*).