3rd Party: Anaplan — Connections Failing with Error "Anaplan server encountered an unknown failure."

Incident Report for Fivetran

Resolved

Incident Summary:

Description:
Anaplan connector syncs were failing with HTTP 500 errors, displaying the message "Anaplan server encountered an unknown failure." This was due to a service outage on the Anaplan platform.

Timeline:
The issue began on 18 December at 1:00 PM UTC and was resolved at 02:15 PM UTC.

Cause:
The failures occurred as a result of a service outage on the Anaplan platform.
More details: https://status.anaplan.com/incidents/pkmklp87pl6y

Resolution:
The Anaplan team has resolved the outage and restored the service. Once the platform was back online, Fivetran connections automatically recovered, and subsequent sync jobs have been completing successfully.

Posted Dec 18, 2025 - 16:30 UTC