From https://redhat.service-now.com/surl.do?n=PNT0505555 :

MRRC GA is very very slow to respond. I did a small test - It took me 33 seconds to load the root of the repository. I tried to refresh the page and took 31 seconds. If I load root of Maven Central it loads in 55 ms. It is affecting Red Hat customers, whole Middleware, builds in PNC, and others.