Fivetran: OAuth Authentication Issues Affecting Multiple Connections

Incident Report for Fivetran

Resolved

This incident has been resolved. We have observed that error rates have returned to normal levels, and the service is operating as expected.

Incident Summary
Description:
We identified an issue with the OAuth Authentication that is affecting multiple connections, resulting in a 404 error.

Timeline:
The issue began on 26/03/2026 at 09:09 UTC and was resolved on 26/03/2026 at 16:42 UTC.

Cause:
During an ingress upgrade, an error caused OAuth callback requests to return HTTP 404 responses. This led to authentication failures for connections relying on OAuth.

Resolution:
The change was reverted, which restored normal OAuth functionality for Fivetran connections.
Posted Mar 26, 2026 - 17:12 UTC

Monitoring

A fix has been implemented and we are monitoring the results.
Posted Mar 26, 2026 - 17:00 UTC

Identified

The issue has been identified and we are working to resolve it.
Posted Mar 26, 2026 - 16:05 UTC
This incident affected: Systems (General Services).