Maintenance mode and user session

Question

When I put site in maintenance mode and after turn site back all users sessions are not active (is need to log in account), but I put session to work 2 month and it work.

How to prevent users logout when put site in maintenance?

Answer 1

This is intended behavior, if user does not have "access site in maintenance mode" permission, then user is logged out.

For Drupal 7 take look on user_menu_site_status_alter

For Drupal 8 take look on Drupal\user\EventSubscriber\MaintenanceModeSubscriber