This week I will be migrating the http server which is used by our maven builds (to redirect from mavenrepo.openmrs.org to jfrog). That should happen later this week, probably Wednesday, but I will updated the details here.
I’ve already created the new server, which is currently answering on https://mavenrepo-new.openmrs.org
If you want to test it before the migration, you can change your pom.xml and ~/.m2/settings.xml file to point to the new URL.
I did a module test release, and it appeared to work fine.