This page offers specific troubleshooting tips when you try to add a Juju object and it doesn't go the way you expect.
You can use the
retry-provisioning command in cases where deploying
applications, adding units, or adding machines fails. It allows you to specify
machines which should be retried to resolve errors reported with
For example, after having deployed 100 units and machines, status reports that machines '3', '27' and '57' could not be provisioned because of a 'rate limit exceeded' error. You can ask Juju to retry:
juju retry-provisioning 3 27 57