Kafka has this licensing issue:
Therefore the package is not available in normal bigtop repositories. To get around this, we configured the kafka charm to use the ci.bigtop.apache.org repos. Today, the job for the trunk-repos failed:
This caused the kafka charm to fail to install. In retrospect, using the trunk repos was never a good idea. We should have used the Bigtop-1.2.1 repos instead. PR coming soon to fix this.