Given: deploy_a -> deploy_b (a is a client/connects to b)
Sometimes, not always, when a rolling update of deploy_b is performed (new pods are created), each request made by deploy_a start failing, as if the proxies in the deploy_a pods were not aware that the destination pods for deploy_b had changed. Killing all deploy_a pods (i.e. letting them respawn) fixes the problem.
Unfortunately, I don't have much more than this to say about this, as I did not yet have time to dive deeper into the issue and try to better understand what is going on.
Also, I apologize if this has already been filed, I did not search existing issues.
I just wanted to put it out there because I've been bitten by this since early Conduit versions and have been waiting to have details before filing it...