upgrade-model from 2.9.16 to 2.9.29 error string

[Heitor]

When upgrading a model today from 2.9.16 to 2.9.29 I got a weird WARNING message with a missing interpolation of strings:

$ juju upgrade-model
best version:
    2.9.29
WARNING Updating model config to specify agent-stream=released.
You can reset back to %!q(<nil>) after the upgrade has finished.
started upgrade to 2.9.29

[Heather Lanigan (hmlanigan)]

This is odd, that the value was nil, it shouldn't be by default. What was the value of `juju model-config -m controller agent-stream` in this case?

We can fix the output of course.

[Heather Lanigan (hmlanigan)]

https://github.com/juju/juju/pull/14057

The pr ensure we have a sane default if the agent-stream key is empty or missing from the controller model config. It does not address why that key was missing.

[Heitor (heitorpbittencourt)]

@Heather, sorry for the delay in answering back.

We do have a Jimm setup.

$ juju model-config -m controller agent-stream
ERROR opening API connection: model jimm.foo.com:USER@foo/controller not found

After sshing into the machine with direct access to the controller (not Jimm):

$ juju model-config -m controller agent-stream
released

Maybe Jimm is not forwarding all the model-configs?