If I add this to my server-params:
and inspect any request-cookie, then I can see both MYJID and JSESSIONID is set.
I have thought, JSESSIONID is replaced by MYJID. But JSESSIONID still exists within the cookie besides MYJID.
Is it possible to replace ALL JSESSIONID-Names with MYJID?
Okay, it works. I had forgotten to delete the old cookies (jsessionid) from the browser. The container does use MYJID instead of JSESSIONID.