Hello All,
I'm trying to get a better understanding when to use Session Affinity and
Session Replication and have a question. Let me set my question up by
describing my configuration. It consists of an Apache server with mod_jk and
two Tomcat servers, where the Apache server is configured to load-balance
between the two Tomcat servers. So my question is, if I enable session affinity
but not session replication, how can I failover a connection without losing the
session data?
Let me restate my question more like a use case:
- Given the above configuration of Apache and 2 Tomcat servers
- A session has already been started on Tomcat-1 (session contains data)
- A new request comes in with the same session id. Session affinity is on
so the request should go to Tomcat-1. But Tomcat-1 is down so the request fails
over to Tomcat-2.
- Since session replication is not enabled how does Tomcat-2 get the
session data? Or can it?
Can this problem be solved by using both sticky sessions and session
replication? Or do I have to abandon session affinity and just use session
replication. All the documentation I've read to date indicates not to use
sticky sessions and session replication together.
Thanks,
Rob
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