I think a failing unit test, or some kind of a reproducer, will help move things along.
Gary On Mon, Sep 1, 2025, 07:29 Stankov. Yavor <y.stan...@seeburger.com> wrote: > Hi, > > We just saw that after we updated to the latest Apache HTTP Client > version, our tests started failing because the Via and Vary headers are > missing from the response of the test cases where a proxy is used in > between the client and the server. There is nothing changed on the proxy > side nor on the server side. The tests are still passing if we use an older > version of the Apache HTTP Client. > > Do you have any idea what might be causing this. > > I just saw this entry in the release notes but I'm not sure what this > optimization is about -> HTTPCLIENT-2293: Via header protocol improvements > and performance optimization. > > Best Regards, > Yavor >