This morning, we became aware of an issue with our ClamAV mirror infrastructure that was causing some freshclam instances to fail when trying to download the current updates.
This was a result of one of our mirror sync hosts experiencing an issue. This was resolved by stopping and restarting all services on the machine.
Currently the sync server is healthy, and all requests should be handled normally.
We apologize for any inconvenience this may have caused, and are working to prevent this from occurring in the future.