Re: fedora-secondary mirror sync failing

We provide a mirror of both fedora and fedora-secondary at: https://mirror.bytemark.co.uk/ The fedora one seems to be updating fine, but on fedora-secondary we are constantly getting: --- Non-interactive session.  Logging to /mirror/logs/mirror-updates/fedora-secondary.log. ---------------------------- Fedora Master Mirror Servers ---------------------------- If you are using bare rsync to sync content, please stop and take a look at https://pagure.io/quick-fedora-mirror. See http://fedoraproject.org/wiki/Infrastructure/Mirroring for further instructions. ---------------------------- @ERROR: max connections (20) reached -- try again later rsync error: error starting client-server protocol (code 5) at main.c(1666) [Receiver=3.1.2] --- It does succeed sometimes - during the night about once every few days, but gives this at other times. It appears we're using: "rsync://dl.fedoraproject.org/fedora-secondary" Please could you advise?