How to pass user abort from nginx to apache?

Question

Nginx

I set up a realtime exchange of bitrix with 1c and ran into a problem - when 1c terminates the connection through user abort (this is intended), nginx closes the connection, and Apache continues to process the request. As a result, connections accumulate and Apache hangs. Nginx about user abort has only proxy_ignore_client_abort, which is not about that at all .. So the question is - what to do so that connections do not accumulate?

Answer 1

and this exchange for Apache cannot be run bypassing nginx?