warning: Invalid argument supplied for foreach() in /var/www/drupal/includes/file.inc on line 456.

Fatal error: Table './drupal/watchdog' is marked as crashed and last (automatic?) repair failed query: INSERT INTO watchdog (uid, type, message, severity, link, location, hostname, timestamp) VALUES (0, 'php', 'Invalid argument supplied for foreach() in /var/www/drupal/includes/file.inc on line 456.', 2, '', '/image/view/22', '69.105.142.29', 1366259591) in /var/www/drupal/includes/database.mysql.inc on line 66