How to correct set the cookies for a subdomain in JSP?

Question

I have the following setup:

• all the requests are https (I will just omit this in the following description)
• 3 docker servers: localhost:8090, localhost:80

Answer 1

based on this (https://curl.haxx.se/rfc/cookie_spec.html) the domain should contain at least 2 dots so the answer is to use other alias for localhost to simulate my subdomains. Something like: *.example.com

After changing the domain all worked as anticipated.