A few of my Red Hat servers run cron jobs to check for updates. starting yesterday (Thursday October 1st, 2015) at around 3PM I encountered 503 unavailable errors when attempting to contact a Fedora Project URL that hosts the metalink for the rhui-REGION-rhel-server-releases repository - a core RHEL repository for EC2. Could not get metalink https://mirrors.fedoraproject.org/metalink?repo=epel-7&arch=x86_64 error was 14: HTTPS Error 503 - Service Unavailable 3 hours later or so, the URL began responding again, but the problems remained. `yum` now reports corrupted update announcements from the repo: Update notice RHSA-2014:0679 (from rhui-REGION-rhel-server-releases) is broken, or a bad duplicate, skipping. You should report this problem to the owner of the rhui-REGION-rhel-server-releases repository. Update notice RHSA-2014:1327 (from rhui-REGION-rhel-server-releases) is broken, or a bad duplicate, skipping. Update notice RHEA-2015:0372 (from rhui-REG...