Open Stack

Hi there logging experts,

We've recently had a little disagreement in the glance team about the
appropriate log levels for http requests that end up failing due to user
errors. An example would be a request to get an image that does not exist,
which results in a 404 Not Found request.

On one hand, this event is an error, so DEBUG or INFO seem a little too
low. On the other hand, this error doesn't generally require any kind of
operator investigation or indicate any actual failure of the service, so
perhaps it is excessive to log it at WARN or ERROR.

Please provide feedback to help us resolve this dispute if you feel you can!

Thanks,
markwash
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