# Fly.io: Increased app-not-found errors

- Impact (vendor’s label): minor
- Status: resolved
- Started: 2026-08-09 02:50 UTC · Resolved: 2026-08-09 07:10 UTC · Duration: 4.3 h
- Updates: 6 · Affected components: Machines API
- [Vendor status page: https://status.flyio.net/incidents/01KZSP4AQJQ48QDS400E9QV6VZ](https://status.flyio.net/incidents/01KZSP4AQJQ48QDS400E9QV6VZ)
- [Company: Fly.io](https://rewindex.com/company/fly-io.md)

## Timeline of updates

- **investigating** 2026-08-09 02:50 UTC: We are currently investigating app-not-found errors returned by Machines API calls made shortly after creating new applications.
- **identified** 2026-08-09 03:50 UTC: We have identified the issue as failed insertions in a subset of Corrosion batches. These failures trigger retries, which can cause timeouts for other batches.
- **identified** 2026-08-09 04:58 UTC: We’ve applied a mitigation to reduce the impact from Corrosion batch insertion retries and are continuing to monitor while affected nodes catch up.
- **identified** 2026-08-09 06:03 UTC: We’ve deployed an additional mitigation to further reduce Corrosion retry pressure and are seeing improvement; we’re continuing to monitor while remaining affected nodes catch up.
- **monitoring** 2026-08-09 06:42 UTC: A fix has been implemented and we are monitoring the results
- **resolved** 2026-08-09 07:10 UTC: This incident has been resolved.


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Canonical: https://rewindex.com/company/fly-io/incidents/01KZSP4AQJQ48QDS400E9QV6VZ · Markdown: https://rewindex.com/company/fly-io/incidents/01KZSP4AQJQ48QDS400E9QV6VZ.md · JSON: https://rewindex.com/api/v1/companies/fly-io/incidents/01KZSP4AQJQ48QDS400E9QV6VZ · Generated 2026-10-18T09:55:39.049Z