I don’t know how to solve this issue. Can anybody help? 
[error] 721#0: *73073 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 123.456.78.9, server: example.com, request: "GET /page-2 HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "www.example.com", referrer: "http://www.example.com/page/2"