[CentOS] yum-cron hourly errors

Thu Oct 12 12:14:12 UTC 2017
John Ratliff <john at bluemarble.net>

I receive messages like this from cron often. Not every hour, and not 
consistently between the servers running CentOS, but at least two per 
day. Is this normal?

/etc/cron.hourly/0yum-hourly.cron:

Could not retrieve mirrorlist 
http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock 
error was

14: HTTP Error 403 - Forbidden

Could not retrieve mirrorlist 
http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=extras&infra=stock 
error was

14: HTTP Error 403 - Forbidden

Could not retrieve mirrorlist 
http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=updates&infra=stock 
error was

14: HTTP Error 403 - Forbidden