# Census: Sync might be failing with mismatch errors

- Impact (vendor’s label): major
- Status: resolved
- Started: 2025-04-04 22:40 UTC · Resolved: 2025-04-05 16:23 UTC · Duration: 18 h
- Updates: 5 · Affected components: Sync Engine
- [Vendor status page: https://stspg.io/sj2xqkwhys9d](https://stspg.io/sj2xqkwhys9d)
- [Company: Census](https://rewindex.com/company/census.md)

## Summary

Census reported a major Sync Engine incident where some syncs failed with mismatch errors, starting 2025-04-04 22:40 UTC and resolved 2025-04-05 16:23 UTC (17 h 42 min). Census attributed failures to a performance issue, said errors could appear after the problem was resolved, and advised customers to rerun affected syncs. _(machine-written, sol)_
## Timeline of updates

- **investigating** 2025-04-04 22:40 UTC: We are currently investigating issue with some syncs failing with mismatch errors.
- **monitoring** 2025-04-04 23:00 UTC: We experienced a performance issue from ~3:00-3:15pm Pacific that may have caused some syncs to fail with a message about "mismatch counts".  We believe we have resolved the problem, but syncs that encountered the issue may not report an error until sometime after the fact, so errors may continue to trickle in. If you encounter this error, please attempt to rerun your sync.  If a rerun does not succeed, please contact support.
- **monitoring** 2025-04-05 01:18 UTC: This issue is resolved.
- **monitoring** 2025-04-05 16:21 UTC: We are continuing to monitor for any further issues.
- **resolved** 2025-04-05 16:23 UTC: This incident has been resolved.

## Rewindex changes for this incident

- 2025-04-04 22:40 UTC: [Major incident: Sync might be failing with mismatch errors](https://rewindex.com/change/i8a5838b9185edf.md)


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Canonical: https://rewindex.com/company/census/incidents/dc644lcgv75n · Markdown: https://rewindex.com/company/census/incidents/dc644lcgv75n.md · JSON: https://rewindex.com/api/v1/companies/census/incidents/dc644lcgv75n · Generated 2026-10-18T12:21:15.985Z