Comment 2 for bug 1444861

Update for perrito666:

This has been confirmed on AWS and HPCloud substrates (but i imagine it affects more)

Steps to reproduce:

Clone the juju-plugins repository according to the readme: https://github.com/juju/plugins/blob/master/README.md

Once you have confirmed the DHX plugin is present, create a debug-hooks-rc.yaml in your $JUJU_HOME directory, similar to the following:

import_ids: ['mbruzek','whitmo', 'lazypower']

Bootstrap and deploy services

juju bootstrap
juju deploy trusty/mariadb

Attempt to connect to a host once a service is registered:

juju dhx mariadb/0

The unit will attempt to register SSH Keys and panic - aborting the connection.