offering a relation that does not exist breaks the model

[Peter Jose De Sousa]

Hi,

If I deploy a LMA model and offer a relation which does not exist (prometheus:http) juju errors with the following message as expected:

ERROR cannot update application offer "prometheus": getting relation endpoint for relation "http" and application "prometheus": application "prometheus" has no "http" relation

The bug arises in that after this message appears any subsequent calls to juju result the same message, for example when running juju status:

➜ autoscaling juju status
ERROR could not fetch application offers: getting relation endpoint for relation "http" and application "prometheus": application "prometheus" has no "http" relation

Example bundle that exhibits this issue:

https://private-fileshare.canonical.com/~pjds/lp-1954830/lma-bundle.yaml

Script to break juju:

https://private-fileshare.canonical.com/~pjds/lp-1954830/offer.sh

[Workaround]

None at the time of writing,

Thanks,

Peter

[Jordan Barrett (barrettj12)]

https://github.com/juju/juju/pull/15677

[Alan Baghumian (alanbach)]

I got myself into this situation and it was ugly. It also overloads the controller due to the infinite loop.

Thanks to nightly Juju backups I was able to dig myself out of this situation and then upgraded the controller and the subsequent models!

Backup your Juju!