Post request for https URL in Headless client

oke, that’s clear now.

Strange that Java does not know the CA of Symantec…
Which Java version are you using, and are you 100% sure, that there is only 1 Java instance on the server?

Else, I would’nt know what is going on. You need than a consultant, I think, to have an in-depth look, what is going on…