How to solve the problem with sessions in Drupal 7?

Question

PHP

I have a rather strange situation, maybe it's just me. There is a site that functioned perfectly on Drupal 7.17, now it is running Drupal 7.31. The situation is as follows: if you log in with any Drupal user, then the session variables are saved without problems, and if you exit your authorization, then no session variables are saved anymore, and no errors are written.
Where to rummage, where to look and what to do with this problem?
Now I’ll clarify my questions, saving session variables is not done for anonymous users.

Answer 1

either use https://www.drupal.org/project/session_api or write the required data in cookies