# Contentful: Major incident: Issues with advanced caching on Content Delivery API

**Summary:** Contentful reported major issues with advanced caching, specifically Stale While Revalidate (SWR), affecting Content Delivery API and EU data residency - Content Delivery API. The incident started 2026-10-01 09:27 UTC and resolved 2026-10-02 09:43 UTC, lasting 24 h 15 min. A fix resolved the issue for remaining customers after most had already recovered. _(machine-written, sol)_
- Kind: Major incident · Label: degradation (model (Jev))
- Changed: 2026-10-01 09:27 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/y8h16hdpq6h6](https://stspg.io/y8h16hdpq6h6)
- [Company: Contentful](https://rewindex.com/company/contentful.md)
- Versions: before (none: first archived) → after incident\_version:183/ylpch77lp8rm@b574c906125b
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Issues with advanced caching on Content Delivery API
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-10-01 09:27 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-10-02 09:43 UTC
```

**6. Added: Affected components**

```diff
+ Content Delivery API, EU data residency - Content Delivery API
```

**7. Added: Update** (identified) · 2026-10-01 09:27 UTC

```diff
+ We are investigating issues with advanced caching (specifically Stale While Revalidate (SWR)). We have identified the issue and are working towards a resolution.
```

**8. Added: Update** (identified) · 2026-10-01 11:29 UTC

```diff
+ The issue has been resolved for most customers. We continue to work on a resolution for everyone.
```

**9. Added: Update** (monitoring) · 2026-10-02 08:43 UTC

```diff
+ The fix we implemented has resolved the issue for the remaining customers. We continue to monitor the situation.
```

**10. Added: Update** (resolved) · 2026-10-02 09:43 UTC

```diff
+ This issue has been resolved.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-10-01 09:27 UTC | Major incident: Issues with advanced caching on Content Delivery API (this change) | degradation |

All Contentful changes: [timeline](https://rewindex.com/company/contentful/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/ib2abe009442676 · Markdown: https://rewindex.com/change/ib2abe009442676.md · JSON: https://rewindex.com/api/v1/changes/ib2abe009442676 · Generated 2026-10-18T00:38:04.061Z