2020/08/03 04:08:04 [alert] 681#681: *700685 768 worker_connections are not enough while connecting to upstream, client: *.*.*.*, server: gun.maskbook.com, request: "GET /gun HTTP/1.1", upstream: "http://127.0.0.1:8765/gun", host: "gun.maskbook.com"
workaround on /etc/nginx/nginx.conf
events {
worker_connections 10000;
multi_accept on;
}