That's very common with stateful applications. Lots of people use HAProxy or other application-aware LB's to keep the sessions "sticky" to a single app server.

That's very common with stateful applications. Lots of people use HAProxy or other application-aware LB's to keep the sessions "sticky" to a single app server. https://www.haproxy.com/blog/enable-sticky-sessions-in-haproxy/ https://www.haproxy.com/blog/enable-sticky-sessions-in-hapro... https://www.haproxy.com/blog/load-balancing-affinity-persistence-sticky-sessions-what-you-need-to-know/ https://www.haproxy.com/blog/load-balancing-affinity-persist...