Can you paste the error when such failure occurs? I can try and escalate this to our IS department to check why keyserver.ubuntu.com is so unreliable, but I need more information about the nature of the failure.
I'd also suggest that rf-setup script could be updated to have keyserver.ubuntu.com as the primary keyserver to try and then if it fails, try a couple of others.
Can you paste the error when such failure occurs? I can try and escalate this to our IS department to check why keyserver. ubuntu. com is so unreliable, but I need more information about the nature of the failure.
I'd also suggest that rf-setup script could be updated to have keyserver. ubuntu. com as the primary keyserver to try and then if it fails, try a couple of others.