it is causing Fuse Tooling test to fail with this kind of error:

Failed to execute goal org.jboss.redhat-fuse:fabric8-maven-plugin:7.4.0.fuse-sb2-740020:resource (default) on project camel-ose-springboot-xml: Execution default of goal org.jboss.redhat-fuse:fabric8-maven-plugin:7.4.0.fuse-sb2-740020:resource failed: Plugin org.jboss.redhat-fuse:fabric8-maven-plugin:7.4.0.fuse-sb2-740020 or one of its dependencies could not be resolved: Failed to collect dependencies at org.jboss.redhat-fuse:fabric8-maven-plugin:jar:7.4.0.fuse-sb2-740020 -> io.fabric8:fabric8-maven-plugin:jar:3.5.33.fuse-740029 -> io.fabric8:docker-maven-plugin:jar:0.23.0.fuse-740006: Failed to read artifact descriptor for io.fabric8:docker-maven-plugin:jar:0.23.0.fuse-740006

the http://repository.jboss.org/nexus/content/groups/m2-release-proxy/io/fabric8/docker-maven-plugin/0.23.0.fuse-740006/ is empty
it is the latest 7.4.0 build available

only the http://repository.jboss.org/nexus/content/groups/m2-release-proxy/io/fabric8/docker-maven-plugin/0.23.0.fuse-740001/ is nto empty
https://fusesource-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/job/fuse-7.4-release-pipeline/ is green
and https://fusesource-jenkins.rhev-ci-vms.eng.rdu2.redhat.com/job/fuse-7.4.sb2-release-pipeline/ is green too