Gathering header information file(s) from server(s)
Server: CentOS-3.1 - Addons
retrygrab() failed for:
  http://vault.centos.org/3.1/addons/i386/headers/header.info
  Executing failover method
failover: out of servers to try
Error getting file http://vault.centos.org/3.1/addons/i386/headers/header.info
[Errno 7] HTTP Error (CannotSendRequest):