Solved
CDP Runtimes 7.1.9 CHF7 wrong URL
The new cumulative hotfix 7 for Cloudera Runtimes 7.1.9 points to CHF6 instead 😉
https://docs.cloudera.com/cdp-private-cloud-base/7.1.9/runtime-release-notes/topics/chf7-pvcb-overview.html
(probably a copy/paste issue 😉 )

