On z/OS, How can I run multiple ARSSOCKD's all using different exits?

[Ed_Arnold]

Answer: use the MVS Dynamic Exit Point Exits facility.

https://www-304.ibm.com/support/docview.wss?uid=swg21425992

On one of my systems I have 3 ARSSOCKD's running and all of them are using separate exits.

If you're stopping and starting ARSSOCKD's just to test an upgrade, don't.  It's easy to run multiple ARSSOCKD's simultaneously.