proxy_pass and concurrent connections

[Дилян Палаузов]

Hello,

when I try to enter a bug at https://trac.nginx.org/nginx/newticket#ticket, choose as version 1.12.x and submit the system rejects the ticket with the message:

Warning: The ticket field 'nginx_version' is invalid: nginx_version is required

And here is the actual question:

proxy_pass can accept an URL or a server group. When a server group (upstream) is defined, then with max_conns= the maximum number of simultaneous connections can be specified.

The documentation of proxy_pass shall clarify, whether by default with URL only consequent connections are allowed/whether defining upstream is the only way to introduce parallelism towards the proxy.

Regards
   Dilian