Nginx upstream sent too big header while reading response header from upstream

Originally published at: https://www.cyberciti.biz/faq/nginx-upstream-sent-too-big-header-while-reading-response-header-from-upstream/

Nginx upstream sent too big header while reading response header from upstream

I am getting the following error and my app stops working:

    2020/07/12 14:32:03 [error] 45625#45625: *10918 upstream sent too big header while reading response header from upstream, client: 139.xxx.yyy.zzz, server: www.nixcraft.com, request: “POST /app/mg/posts HTTP/2.0”, upstream: “fastcgi://unix:/run/php/php-fpm.sock:”, host: “www.nixcraft.com”, referrer: “https://www.nixcraft.com/mg/admin/index.app

How do I fix this error for Nginx web server running on Linux or Unix-like systems?


Linux sysadmin blog - Linux/Unix Howtos and Tutorials - Linux bash shell scripting wiki