IssueTracker

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Please provide as much information as possible. At least, this should include a description of your issue and steps to reproduce the problem. If possible please provide a summary of what steps or workarounds you have already tried, and any docs or articles you found (un)helpful.

Problem you have encountered: Adding of tags could make the image briefly unavailable / not found [1]


What you expected to happen:  Updating the <image>:dev tag works without downtime.
Resolution to the old value for a few seconds would be preferred over
getting a "not found".

[1] failed to resolve dev:
location-docker.pkg.dev/project-id/repo/image:dev:
not found

Steps to reproduce:
1. Have a script that continuously pulls <image>:dev
2. Update the dev tag via `gcloud artifacts docker tags add
<image>:1.2.0 <image>:dev`

With just a single concurrent request in the pull script around 20% of the
times this causes one failed request (when e.g. alternating between 1.1.0
and 1.2.0 as version for the dev tag).


Other information (workarounds you have tried, documentation consulted, etc):