# Census: Major incident: Census unavailable. 503 Error page from the Web.

**Summary:** Census reported a major outage affecting the Sync Management UI and Sync Engine, with a 503 error page, from 2025-01-07 20:53 UTC to 2025-01-07 21:28 UTC (35 min). An infrastructure upgrade inadvertently removed services; all services recovered, and queued syncs began starting at 2025-01-07 21:18 UTC. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2025-01-07 20:53 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/2l330r7hxnfg](https://stspg.io/2l330r7hxnfg)
- [Company: Census](https://rewindex.com/company/census.md)
- Versions: before (none: first archived) → after incident\_version:136/zmp6lzlqt8pk@4d04eb6b9f57
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Census unavailable. 503 Error page from the Web.
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2025-01-07 20:53 UTC
```

**5. Added: Resolved time**

```diff
+ 2025-01-07 21:28 UTC
```

**6. Added: Affected components**

```diff
+ Census Sync Management UI, Sync Engine
```

**7. Added: Update** (investigating) · 2025-01-07 20:53 UTC

```diff
+ We are investigating the issue and will update ASAP.
```

**8. Added: Update** (investigating) · 2025-01-07 20:56 UTC

```diff
+ The root cause has been identified and we are working to resolve.
```

**9. Added: Update** (identified) · 2025-01-07 21:10 UTC

```diff
+ The Census UI is now back up. Our sync engine is in the process of coming back up.
```

**10. Added: Update** (monitoring) · 2025-01-07 21:18 UTC

```diff
+ All services are operational. Any queued syncs are starting up now.
```

**11. Added: Update** (resolved) · 2025-01-07 21:28 UTC

```diff
+ Everything is now 100% operational. The problem came from an upgrade of our infrastructure that inadvertently removed services. We are planning now to make sure this dependency problem won't be at risk in future upgrades.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2025-01-07 20:53 UTC | Major incident: Census unavailable. 503 Error page from the Web. (this change) | outage |

All Census changes: [timeline](https://rewindex.com/company/census/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/i664b2477490414 · Markdown: https://rewindex.com/change/i664b2477490414.md · JSON: https://rewindex.com/api/v1/changes/i664b2477490414 · Generated 2026-10-18T02:55:23.795Z