We have a virtual Docker repository that includes both our local Docker repo and several remote Docker registries.
We recently upgraded to 6.17.0 and started seeing ERROR logs when requesting docker images that doesn't exist in either the local or the remote repos.
The current log level is ERROR but I would argue that there is nothing erounous about a missing manifest for a non existing docker image. It's the client that did something wrong, requesting a non existing image, which shouldn't casuse an ERROR message on the server.
I expect that these logs are lowered from ERROR to a sensible loglevel, like WARNING or INFO.