It's been about 4 years since I've been on one of these lists, so here goes:

We've been using client variables quite successfully for some years now in a 
load-balanced environment with a database client variable storage. This has 
continued to CF8.

Although tests made a few months back proved that client variables were holding 
up across servers, recently I made another check and found them changing. For 
the test we forced our load-balancer to point from one single server to another 
(thus forcing the browser to - unknowingly - swap servers) but their session is 
lost. In short, the CFTOKEN changed. When we swapped the servers again the 
CFTOKEN changed again. Although JSessionID persists (with a different value) on 
each server, CFTOKEN is created from scratch on each server change and never 
recurs.

We did recently turn on session management and I'm suspicious this be the cause 
but would like to hear some opinions before I have to spend much more time 
replicating the problem in different environments or risking tests in 
production.

Many thanks,

Paolo


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