While accessing Plesk or performing any actions the following error is shown:
502 Bad Gateway
The following error message appears in
recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 203.0.113.2, server: , request: "POST <some url>
[error] 17434#0: *4954 upstream sent too big header while reading response header from upstream, client: 203.0.113.2, server: , request: "GET /modules/xovi/index.php/log-analyzer/index/id/2 HTTP/1.1", upstream: "fastcgi://unix:/var/run/sw-engine.sock:", host: "example.com:8443", referrer: "https://example.com:8443/"
Low FastCGI buffer limits.
Connect to the server via SSH.
/etc/sw-cp-server/configwith a text editor:
# vi /etc/sw-cp-server/config
Increase FastCGI buffer limits using the editor:
fastcgi_buffers 32 32k;
Restart sw-cp-server and sw-engine services:
# service sw-cp-server restart && service sw-engine restart