# Sentry: Critical incident: Delayed ingestion of errors in EU

**Summary:** Sentry reported critical EU ingestion delays affecting new errors, with EU alerting, Dashboard, and attachment, error and span ingestion listed as affected. The incident ran from 2026-09-18 08:36 UTC to 2026-09-18 11:57 UTC (3 h 20 min). Sentry identified an upstream-provider networking issue, implemented mitigation, and restored real-time processing for all data types. _(machine-written, sol)_
- Kind: Major incident · Label: degradation (model (Jev))
- Changed: 2026-09-18 08:36 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/518318wxv2f8](https://stspg.io/518318wxv2f8)
- [Company: Sentry](https://rewindex.com/company/sentry.md)
- Versions: before (none: first archived) → after incident\_version:288/bjysgyqq93gn@9759784e9f7c
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Delayed ingestion of errors in EU
```

**2. Added: Impact**

```diff
+ critical
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-09-18 08:36 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-09-18 11:57 UTC
```

**6. Added: Affected components**

```diff
+ Alerting - EU Errors Alerting, Dashboard, EU Ingestion - EU Attachment Ingestion, EU Ingestion - EU Error Ingestion, EU Ingestion - EU Span Ingestion
```

**7. Added: Update** (investigating) · 2026-09-18 08:36 UTC

```diff
+ We are currently investigating an issue that causes new errors to be delayed in the EU region.
```

**8. Added: Update** (investigating) · 2026-09-18 09:00 UTC

```diff
+ We have implemented a mitigation and are starting to recover.
```

**9. Added: Update** (investigating) · 2026-09-18 09:53 UTC

```diff
+ We are processing real-time data again and are working on burning our backlog.
```

**10. Added: Update** (monitoring) · 2026-09-18 09:54 UTC

```diff
+ We are processing real-time data again and are working on burning our backlog.
```

**11. Added: Update** (monitoring) · 2026-09-18 10:56 UTC

```diff
+ We have identified a networking issue with an upstream provider and are working on mitigations.
```

**12. Added: Update** (identified) · 2026-09-18 10:58 UTC

```diff
+ We have identified a networking issue with an upstream provider and are working on mitigations.
```

**13. Added: Update** (identified) · 2026-09-18 11:45 UTC

```diff
+ Error ingestion is fully operational. We are currently working on recovering real-time processing of spans.
```

**14. Added: Update** (resolved) · 2026-09-18 11:57 UTC

```diff
+ We are processing real-time data for all data types again.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-09-18 08:36 UTC | Critical incident: Delayed ingestion of errors in EU (this change) | degradation |

All Sentry changes: [timeline](https://rewindex.com/company/sentry/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/i0a9c68379afb95 · Markdown: https://rewindex.com/change/i0a9c68379afb95.md · JSON: https://rewindex.com/api/v1/changes/i0a9c68379afb95 · Generated 2026-10-18T02:31:41.865Z