Increased app-not-found errors

Summary

Increased app-not-found errors

This incident has been resolved.

• Started

  Aug 9, 2026 · 2:50 AM

• Resolved

  Aug 9, 2026 · 7:10 AM

• Duration

  4h 20m

• Severity

  Major

• ◐

  Investigating

  Aug 9 · 2:50 AM Fly.io

  We are currently investigating app-not-found errors returned by Machines API calls made shortly after creating new applications.

• ◆

  Identified

  Aug 9 · 3:50 AM Fly.io

  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

  Aug 9 · 4:58 AM Fly.io

  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

  Aug 9 · 6:03 AM Fly.io

  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

  Aug 9 · 6:42 AM Fly.io

  A fix has been implemented and we are monitoring the results

• ✓

  Resolved

  Aug 9 · 7:10 AM Fly.io

  This incident has been resolved.