EPEL-5 has been end of lifed. The build system will no longer produce updates for the operating system and updates to the trees will no longer happen.
The trees as they existed on 2017-03-31 have been archived to /pub/archive/epel/5/ and /pub/archive/epel/testing/5/ . On 2017-04-06, the mirror manager will be updated to point to those trees, and the copy in /pub/epel/5 will be removed.
EPEL-5 was a useful release and has served many people well for a decade. Thank you to all who contributed packages, patches and other help.