# Pinecone: Major incident: [Serverless][AWS][eu-west-1] 5xx errors on some write path operations

**Summary:** Pinecone reported a major incident causing 5xx errors on some Serverless write path operations in AWS eu-west-1, affecting customers writing to indexes in that region. It started at 2025-11-06 14:38 UTC and was resolved at 2025-11-06 14:40 UTC, lasting 2 min; no cause or fix was stated. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2025-11-06 14:38 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/50rgkr4rx018](https://stspg.io/50rgkr4rx018)
- [Company: Pinecone](https://rewindex.com/company/pinecone.md)
- Versions: before (none: first archived) → after incident\_version:35/knqbclkz22d6@b33e10dfa046
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ [Serverless][AWS][eu-west-1] 5xx errors on some write path operations
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2025-11-06 14:38 UTC
```

**5. Added: Resolved time**

```diff
+ 2025-11-06 14:40 UTC
```

**6. Added: Affected components**

```diff
+ AWS eu-west-1, Serverless Indexes - AWS eu-west-1
```

**7. Added: Update** (investigating) · 2025-11-06 14:38 UTC

```diff
+ We are currently investigating this issue.
```

**8. Added: Update** (resolved) · 2025-11-06 14:40 UTC

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

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2025-11-06 14:38 UTC | Major incident: \[Serverless\]\[AWS\]\[eu-west-1\] 5xx errors on some write path operations (this change) | outage |

All Pinecone changes: [timeline](https://rewindex.com/company/pinecone/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._


---
Canonical: https://rewindex.com/change/i7cab8de530fcc7 · Markdown: https://rewindex.com/change/i7cab8de530fcc7.md · JSON: https://rewindex.com/api/v1/changes/i7cab8de530fcc7 · Generated 2026-10-18T02:55:22.472Z