Issue during upgrade with nagios user and empty content

[Benjamin Allot]

Hello,

Upon upgrading to the latest version of the charm, I encountered 2 issues:

1. The nagios user token cannot be retrieved, because the nagios user authentication fails with a 401.
2. The code doesn't handle well an empty response and try to json.loads of "None" in such case, resulting in an exception.

A workaround for the first issue was to delete the nagios user altogether. It was then recreated fine and could be authenticated again.
Here are the logs when doing the upgrade [0] and the juju status after [1].

The second issue will be fixed by a proposed MP.

[0]: https://pastebin.canonical.com/p/2zf4dDNHgD/
[1]: https://pastebin.canonical.com/p/zHQx3MBHHF/

[Benjamin Allot (ballot)]

Here is a MP fixing the JSONDecodeError exception : https://code.launchpad.net/~ballot/charm-graylog/+git/charm-graylog/+merge/391046

[Xav Paice (xavpaice)]

Can you provide any more info on how to reproduce the first point?

"1. The nagios user token cannot be retrieved, because the nagios user authentication fails with a 401."

The MP for fixing the exception with json.loads() is merged, but since this bug has two problems we can't call it closed yet.