NGINX 502 Bad Gateway after v9.3 upgrade
After upgrading Mattermost to v9.3, users get 502 errors when the upstream proxy timeout is too low for the new WebSocket handling.
Resolutions (1)
high confidence 47 verified
Increase NGINX proxy timeouts in your site config:
proxy_read_timeout 600;
proxy_send_timeout 600;
proxy_connect_timeout 600;Then reload NGINX: sudo nginx -s reload
Applies to: 9.3, 9.3.1 on docker, bare-metal