Drupal.org and its sub-sites (api.drupal.org, groups.drupal.org, etc) will be going down for 30 minutes Tuesday, February 12, 5:00 PST (February 13, 01:00 UTC). This maintenance window will be used to upgrade our single sign on system. Please follow the @drupal_infra twitter account for updates during the downtime and thanks for your patience!
Sites will remain functional for the majority of the scheduled downtime, but everyone will be logged out. You may not be able to log into sub-sites for a few minutes as the update is rolled out. If you experience authentication troubles between sites after the maintenance window please clear browser cookies for Drupal.org and try again.