Outage in Fivetran
Fivetran: Multiple PostgreSQL connections failing with "Unknown failure: Unhandled classified exception" due to an issue with JsonB binary decoding
Resolved MinorIncident Report
The issue has been identified and we are working to resolve it.
Components affected
Fivetran Amazon Aurora PostgreSQL Fivetran Azure Database for PostgreSQL Fivetran Google Cloud SQL for PostgreSQL Fivetran Heroku PostgreSQL Fivetran PostgreSQL Fivetran Amazon RDS for PostgreSQLTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
8 months ago - at 08/21/2025 10:46PM
This incident has been resolved.
Incident Summary
Description:
Some PostgreSQL connectors failed due to a problem with JsonB binary decoding.
Timeline:
This issue began on 21 Aug 2025 at 4:00 PM UTC and was resolved at 8:30 PM UTC.
Cause:
An issue with JsonB binary decoding caused PostgreSQL connections to start failing.
Resolution:
Engineering implemented a hotfix, which restored normal operations.
MONITORING
8 months ago - at 08/21/2025 09:12PM
A fix has been implemented and we are monitoring the results.
IDENTIFIED
8 months ago - at 08/21/2025 08:10PM
Engineering has identified the issue as being caused by a problem with JsonB binary decoding, and are working to resolve it.
IDENTIFIED
8 months ago - at 08/21/2025 08:05PM
The issue has been identified and we are working to resolve it.
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