I am using CI version 3.0.3, PHP version 7.0, Redis and MariaDB. 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