I get a 502 error when I purge the cache through the nginx helper plugin
usually 502 is thrown when nginx is not able to connect to phpfpm/gateway process. Is it happening reqpeatedly or happened only once? Is the server load is high?
Have a look into log for more information so that we can pin the exact issue.
tail -f /var/log/nginx/sitename.error.log
Hey @antopjoseph found this in my error log
*1007139 upstream sent too big header while reading response header from upstream
/etc/nginx/conf.d/fastcgi.conf & increase following values.
fastcgi_buffers 16 16k; fastcgi_buffer_size 32k;
current nginx configuration unable to handle the header send by the php-fpm.
Hey, thanks for your reply. How do I calculate the correct values?