How does mod_proxy_balancer know a session is still alive ?

[Lenin <lenin.lee@xxxxxxxxx>]

Hi,

I set up a load balancing environment with mod_proxy_balancer, and use 'stickysession' to achieve session stickyness.

I know this module uses a cookie to keep sessions. The question is, how does it know if a session is still alive ? For example, if there are two servers behind the balancer, 100 sessions for each of them. If the 100 sessions of the first server have already been closed, will apache still assume the first server is busy and throw new sessions to the other one ?

Thanks.