Warning: require_once(/usr/local/www/drupal6/includes/lock.inc) [function.require-once]: failed to open stream: Too many open files in system in /usr/local/www/drupal6/includes/bootstrap.inc on line 1167

Fatal error: require_once() [function.require]: Failed opening required './includes/lock.inc' (include_path='.:/usr/local/share/pear') in /usr/local/www/drupal6/includes/bootstrap.inc on line 1167