Hi, I would like nginx to serve all requests of a given TCP connection to the same FCGI server. If a new TCP connection is established, then nginx would select the next UDS FCGI server in round-robin fashion.

Can this be achieved with NGINX, and if yes, how?

I thought turning on fastcgi_keep_conn on would achieve this goal, but it is not what happened. My obervation was that each FCGI server took turn receiving a new request even if all the requests are from the same TCP connection.

I had:

upstream backend {
server unix:/tmp/fastcgi/socket1 ...;
server unix:/tmp/fastcgi/socket2 ...;
keepalive 32;
}

server {
...
location <uri> {
fastcgi_keep_conn on;
fastcgi_pass backend;
}

Thank you.