3rd Party: Mailchimp connection failures with a Reconnect error
Incident
Report for Fivetran
Resolved
This incident has been resolved. We have observed that instance rates are returning to normal levels, and affected connectors are syncing successfully.
Incident Summary
Description:
We identified an issue impacting Mailchimp connectors, which resulted in widespread sync failures with a "Reconnect" error and subsequent rescheduled syncs.
Timeline:
This issue began on November 4, 2025, at 02:00 UTC and was resolved on November 4, 2025, at 19:30 UTC.
Cause:
The failures were caused by an intermittent fault in one of Mailchimp’s source endpoints (/oauth2/metadata). Since this endpoint’s response is critical for authentication and subsequent API calls, the issue prevented syncs from proceeding, leading to sync failures across affected connectors.
Resolution:
The faulty response from the source endpoint was fixed, after which the affected connectors automatically recovered and resumed normal sync operations.
Incident Summary
Description:
We identified an issue impacting Mailchimp connectors, which resulted in widespread sync failures with a "Reconnect" error and subsequent rescheduled syncs.
Timeline:
This issue began on November 4, 2025, at 02:00 UTC and was resolved on November 4, 2025, at 19:30 UTC.
Cause:
The failures were caused by an intermittent fault in one of Mailchimp’s source endpoints (/oauth2/metadata). Since this endpoint’s response is critical for authentication and subsequent API calls, the issue prevented syncs from proceeding, leading to sync failures across affected connectors.
Resolution:
The faulty response from the source endpoint was fixed, after which the affected connectors automatically recovered and resumed normal sync operations.