I have tested webshop and our custom code which refreshes the page every minute with v. 2021-11-24 and didn't notice anything wrong, lsof did not show any increase in open files.
This is not the issue of upgrade SERP. But serverip.dat in this case contains the value: 192.168.88.12:1301, so this is local IP of the server with SERP.
Anyway I don't understand what do you me...
