# Pinecone: Major incident: [Serverless][AWS][us-west-2] 5xx errors on the readpath

**Summary:** Pinecone reported a major incident causing readpath 5xx errors for Serverless Indexes in AWS us-west-2, from 2026-09-17 05:37 UTC to 2026-09-17 16:44 UTC (11 h 7 min). Pinecone reported mitigation underway, followed by recovery monitoring and resolution; no specific cause or fix was stated. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-09-17 05:37 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/rlkqfv38zkbb](https://stspg.io/rlkqfv38zkbb)
- [Company: Pinecone](https://rewindex.com/company/pinecone.md)
- Versions: before (none: first archived) → after incident\_version:35/pmzbpg3cvb00@99c2ac280330
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ [Serverless][AWS][us-west-2] 5xx errors on the readpath
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-09-17 05:37 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-09-17 16:44 UTC
```

**6. Added: Affected components**

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

**7. Added: Update** (investigating) · 2026-09-17 05:37 UTC

```diff
+ We have identified the issue and we are in the process of mitigating.
```

**8. Added: Update** (monitoring) · 2026-09-17 06:14 UTC

```diff
+ We are recovering and are monitoring to ensure no further errors occur.
```

**9. Added: Update** (resolved) · 2026-09-17 16:44 UTC

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

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-09-17 05:37 UTC | Major incident: \[Serverless\]\[AWS\]\[us-west-2\] 5xx errors on the readpath (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/i6b5afb5a618b23 · Markdown: https://rewindex.com/change/i6b5afb5a618b23.md · JSON: https://rewindex.com/api/v1/changes/i6b5afb5a618b23 · Generated 2026-10-18T00:38:55.322Z