Census incident
Subset of syncs are failing with, "Passed `nil` into T.must"
Resolved after 2 hours 19 minutes, affecting Sync Engine, on November 12, 2025.
The error impacting some customer syncs has now been resolved and syncs are recovering. The syncs impacted were runs with no new data changes to process. This happened due to a recent update that removed the part of our system that correctly handled "no change" scenarios. As a result, syncs without updates failed instead of completing successfully. Syncs with actual data changes were unaffected. We've rolled back the change, and all syncs are now running normally.
Affected components
Update timeline
- identified Nov 12, 2025, 05:41 PM UTC
The issue has been identified and a fix is being implemented.
- monitoring Nov 12, 2025, 06:30 PM UTC
The error impacting some customer syncs has now been resolved and syncs are recovering. The syncs impacted were runs with no new data changes to process. This happened due to a recent update that removed the part of our system that correctly handled "no change" scenarios. As a result, syncs without updates failed instead of completing successfully. Syncs with actual data changes were unaffected. We've rolled back the change, and all syncs are now running normally.
- monitoring Nov 12, 2025, 06:30 PM UTC
The error impacting some customer syncs has now been resolved and syncs are recovering. The syncs impacted were runs with no new data changes to process. This happened due to a recent update that removed the part of our system that correctly handled "no change" scenarios. As a result, syncs without updates failed instead of completing successfully. Syncs with actual data changes were unaffected. We've rolled back the change, and all syncs are now running normally.
- resolved Nov 12, 2025, 08:01 PM UTC
This incident has been resolved.
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