# Pinecone: Major incident: [Serverless][AWS][us-east-1] 5xx errors on some read and write operations

**Summary:** Pinecone reported a major outage causing 5xx errors on some Serverless read and write operations in AWS us-east-1. It started at 2025-09-10 13:16 UTC and was resolved at 2025-09-10 16:38 UTC, lasting 3 h 21 min. A fix was implemented at 13:22 UTC; no cause was stated. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2025-09-10 13:16 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/q04c5pj0t2m3](https://stspg.io/q04c5pj0t2m3)
- [Company: Pinecone](https://rewindex.com/company/pinecone.md)
- Versions: before (none: first archived) → after incident\_version:35/jk4szq3j3pdl@85adc53b69fa
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ [Serverless][AWS][us-east-1] 5xx errors on some read and write operations
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2025-09-10 13:16 UTC
```

**5. Added: Resolved time**

```diff
+ 2025-09-10 16:38 UTC
```

**6. Added: Affected components**

```diff
+ AWS us-east-1, Serverless Indexes - AWS us-east-1
```

**7. Added: Update** (investigating) · 2025-09-10 13:16 UTC

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

**8. Added: Update** (monitoring) · 2025-09-10 13:22 UTC

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

**9. Added: Update** (resolved) · 2025-09-10 16:38 UTC

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

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2025-09-10 13:16 UTC | Major incident: \[Serverless\]\[AWS\]\[us-east-1\] 5xx errors on some read and write 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/i1c083876676a1a · Markdown: https://rewindex.com/change/i1c083876676a1a.md · JSON: https://rewindex.com/api/v1/changes/i1c083876676a1a · Generated 2026-10-18T03:55:52.844Z