Hi,
In the past few days I have had a number of websites getting 521 errors. I have been speaking to the guys that manage my web sever they have whitelisted all Cloudflare IPs and checked there is nothing blocking the Cloudflare we thought we had resolve the issue but it started again today.
We are running cPanel ad have the Cloudflare app installing using Railgun. After doing some more digging we found the below in the logs do you know how we can fix this or what it could be?
Dec 22 06:59:23 server2 rg-listener: [6c1777983de97783-LHR] connection failed tangand.co.uk$188.64.187.180:443/tangand.co.uk: socket: too many open files
Dec 22 06:59:23 server2 rg-listener: [6c17779879da76c0-LHR] connection failed tangand.co.uk$188.64.187.180:443/tangand.co.uk: socket: too many open files
Dec 22 06:59:23 server2 rg-listener: [6c177798aacc8867-LHR] connection failed tangand.co.uk$188.64.187.180:443/tangand.co.uk: socket: too many open files
Dec 22 06:59:24 server2 rg-listener: [6c177798eeb288a1-PRG] connection failed tangand.co.uk$188.64.187.180:443/tangand.co.uk: socket: too many open files
Dec 22 06:59:24 server2 rg-listener: [6c17779df9a872f7-LHR] connection failed tangand.co.uk$188.64.187.180:443/tangand.co.uk: socket: too many open files
Dec 22 06:59:25 server2 rg-listener: [6c1777a29dbb7686-PRG] connection failed tangand.co.uk$188.64.187.180:443/tangand.co.uk: socket: too many open files
Dec 22 06:59:25 server2 rg-listener: [6c1777a32ee07798-LHR] connection failed tangand.co.uk$188.64.187.180:443/tangand.co.uk: socket: too many open files
Thanks,
James {redacted}