`github_workflow_job_duration_ms` having massive negative value e.g. `-63911756733000`

[s4nji]

Hello!

I noticed that the github_workflow_job_duration_ms metrics sometimes have massively large value e.g. -63911756733000.
This causes aggregation operators (sum, etc.) to have wonky results.
For now I am removing the faulty metrics with explicit greater than 0 filter.

The -63911756733000 value seems to be the result when subtracting time.Now() against null time; it results in a value in the range of negative 63 trillion:

// https://go.dev/play/p/Aisjl4galN9

x := time.Time{}.UnixMilli() - time.Now().UnixMilli()
fmt.Println(x)

// -63393490800000

Not sure where the null is coming from; querying github about the affected jobs, they seem to have normal results:

gh api repos/xxx/yyy/actions/jobs/11111111111 --jq '{created_at, started_at}' 
{
  "created_at": "2026-04-13T23:44:11Z",
  "started_at": "2026-04-13T23:44:14Z",
}

[tboerger]

It doesn't matter which timestamps are returned by the API, but it matters what Github sent via webhook and what have been stored into the database used by the exporter. Can you share details about that?