CodeIgniter: Codeigniter session error in Redis using PHP 7.0

When I store session data in the Database, there are no errors. But if I switch to Redis, I get an error every time session tries to regenerate via session_regenerate_id, in my case every 300 sec. But if I refresh the page again, Redis get updated and page loads without errors.

A PHP Error was encountered
Severity: 4096
Message: session_regenerate_id(): Failed to create(read) session ID: user (path: tcp://localhost:6379?auth=xxxx)
Filename: Session/Session.php
Line Number: 625

About this issue

Original URL
State: closed
Created 8 years ago
Comments: 17 (6 by maintainers)

Commits related to this issue

Fix #4362 — committed to bcit-ci/CodeIgniter by narfbg 8 years ago

Most upvoted comments

No, but it solved the issue related to these messages appearing in our logs

There is no race condition issue if we don’t update sessions in the method.

As I was saying this is not a proper fixing of the problem, and anyone reading this shouldn’t go for that “solution”, as it’s not a solution, it’s just a workaround, and that’s not great at all…

If there is a problem, it’s still there and it requires fixing.

gxgpet on Aug 26, 2021

Has anyone found a resolution for the Session: Unable to obtain lock for ci_session:xxx issue when using Redis for sessions?

We are also seeing this on PHP 7.4.20 and CI 3.1.11, and it is always related to concurrent ajax requests.

schmoove on Aug 24, 2021