Hi,

I am using nginx as proxy with an upstream configuration:

upstream example_server {
server localhost:9000 fail_timeout=0;
keepalive 64;
}

Everything works fine when configuring location to include proxy_http_version and connection header:

location ... {
send_timeout 300;
client_body_buffer_size 1024k;
proxy_read_timeout 300;
...

proxy_http_version 1.1;
proxy_set_header Connection "";

...
proxy_pass http://example_server;
}

Responses for both HTTP GET and POST requests contain "keep-alive" and "server nginx" headers.
However, when I try to set proxy_http_version and connection header within server or http context instead of location, nginx will only proxy GET requests. Responses for any POST requests seem to be coming directly from my application server (no keep-alive headers and server name contains application server instead of nginx). What am I missing here?