Here at University of Aveiro, Portugal, we have Moodle 2.4 installed for our students. If we have dbsessions configured to use MySQL we have a lot of this erros:
[error] [client 192.168.xxx.xxx] Can not write database session - please verify max_allowed_packet is at least 4M!
But we are 100% sure that the max_allowed_packet is bigger than 4M.
Any of you guys have the same problem?