Hi Team I'm experiencing 504 timeout error when accessing a JSP file in a directory (https://example.com/dev/index.jsp). The logs simply says this: [error] 1840#0: *16408115 connect() failed (111: Connection refused) while connecting to upstream, client: 192.168.15.5, server: 192.168.15.4, request: "GET /dev/index.jsp?error=%20not HTTP/1.1", upstream: "https://192.168.15.3:443//index.jsp?error= not" in attachment my nginx.conf file. my system: Linux serveur 3.10.0-1062.12.1.el7.x86_64 ; nginx version: nginx/1.17.7 What is the solution for this type of 504 timeout error?