Go module updates on Mend-hosted periodically "flip flop" between open/autoclosed

[jamietanna]

How are you running Renovate?

A Mend.io-hosted app

Which platform you running Renovate on?

github.com

Which version of Renovate are you using?

43.125.0

Please tell us more about your question or problem

Sometimes, Renovate PRs that were raised for a given Go module dependency (via the public Go proxy) will result in a "flip flop" behaviour, where it'll be autoclosed and then re-opened.

As per the additional information we get from #42120, we can see that there is a no-result returned from the Go proxy (but not any additional information)

This leads to a PR being opened, and then at some point later, a call to the Go proxy failing for that package, after which the PR is then autoclosed.

At a later point, it's then re-opened, and the cycle continues.
There's a good example of this happening with oapi-codegen/echo-middleware#32

(Job ID: 019da4d3-815f-7c38-83ee-95a9cfd8f9ef)

(I've noticed this for at least a year or so, but hadn't yet raised this)

(On Monday - when I'm back at work - I'll investigate further + see if we have any other reports of this, as this looks more likely to affect Mend-hosted apps and our cache between repos)

Logs (if relevant)

Logs

DEBUG: Failed to look up go package github.com/getkin/kin-openapi: no-result
{
  "dependency": "github.com/getkin/kin-openapi",
  "packageFile": "go.mod"
}
...
WARN: Package lookup failures (branch="renovate/actions-setup-go-5.x")
{
  "warnings": [
    "Failed to look up go package github.com/getkin/kin-openapi: no-result"
  ],
  "files": [
    "go.mod"
  ]
}