Visiting any page results in a new session by default making it difficult to work with web accelerators like Varnish etc.
edit: I think it might also be the cause of the PDOException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry ... UPDATE {sessions} ... error when $conf[https] = TRUE; is set.
Start the temporary session only when the user is IP restricted, and not before.
And leave the drupal_session_start() triggering behaviour to Drupal.
Alternatively, couldn't we just set drupal_page_is_cacheable(TRUE); and be done, removing the need for the temporary session?
Create patch for new behaviour.
Fixed
2.0
Code
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Issue #3152850 by codebymikey: Don't start a PHP session unnecessarily (...
Since a bug I'll include in the dev branch of D7, but D7 EOL soon. Last D7 issue here!
Automatically closed - issue fixed for 2 weeks with no activity.