How to avoid nginx “upstream sent too big header” errors?
问题 I'm running nginx, Phusion Passenger and Rails. I am running up against the following error: upstream sent too big header while reading response header from upstream, client: 87.194.2.18, server: xyz.com, request: "POST /user_session HTTP/1.1", upstream: "passenger://unix:/tmp/passenger.3322/master/helper_server.sock It is occuring on the callback from an authentication call to Facebook Connect. After googling, and trying to change nginx settings including proxy_buffer_size and large_client