# Pinecone: Major incident: [Serverless][AWS][us-west-2] 5xx errors on read path operations for some namespaces

**Summary:** Pinecone reported a major incident causing 5xx errors on read-path operations for some Serverless namespaces in AWS us-west-2, affecting customer reads. It started at 2025-12-03 15:53 UTC and was resolved at 2025-12-03 16:40 UTC, lasting 46 min; Pinecone implemented a fix but did not state a cause. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2025-12-03 15:53 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/6hd1rxbf2j4w](https://stspg.io/6hd1rxbf2j4w)
- [Company: Pinecone](https://rewindex.com/company/pinecone.md)
- Versions: before (none: first archived) → after incident\_version:35/th4c4dx3c70d@3798c0e14614
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ [Serverless][AWS][us-west-2] 5xx errors on read path operations for some namespaces
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2025-12-03 15:53 UTC
```

**5. Added: Resolved time**

```diff
+ 2025-12-03 16:40 UTC
```

**6. Added: Affected components**

```diff
+ AWS us-west-2, Serverless Indexes - AWS us-west-2
```

**7. Added: Update** (investigating) · 2025-12-03 15:53 UTC

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

**8. Added: Update** (identified) · 2025-12-03 16:15 UTC

```diff
+ The issue has been identified and a fix is being implemented.
```

**9. Added: Update** (monitoring) · 2025-12-03 16:31 UTC

```diff
+ A fix has been implemented and we are monitoring the results.
```

**10. Added: Update** (resolved) · 2025-12-03 16:40 UTC

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

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2025-12-03 15:53 UTC | Major incident: \[Serverless\]\[AWS\]\[us-west-2\] 5xx errors on read path operations for some namespaces (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._


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Canonical: https://rewindex.com/change/i146a4e78e84269 · Markdown: https://rewindex.com/change/i146a4e78e84269.md · JSON: https://rewindex.com/api/v1/changes/i146a4e78e84269 · Generated 2026-10-18T02:55:00.819Z