Yesterday when I tried building a common service, it yield an error
253 Caused by: org.eclipse.aether.resolution.ArtifactResolutionException: The following artifacts could not be resolved: org.geotools:gt-main:jar:21.2, org.geotools:gt-epsg-wkt:jar:21.2, org.geotools:gt-epsg-hsql:jar:21.2: Could not find artifact org.geotools:gt-main:jar:21.2 in spring-milestones (https://repo.spring.io/milestone)
It was success just a few hours ago, before the issue occurs. No change has been made for a long while.
We use several repository, one of them is http://download.osgeo.org/webdav/geotools. But it seems the URL is down now. No idea when and why it was down - I can't find anything on the osgeo.org home page.
Is there anyway to get warnings about this kind of issue? What should I do to prevent the problem from happening again?