# Pinecone: Major incident: [Serverless][GCP][europe-west4] 5xx errors on read and write operations for some indexes

**Summary:** Pinecone reported a major outage causing 5xx errors on read and write operations for some Serverless indexes in GCP europe-west4. It started at 2025-12-15 10:39 UTC and was resolved at 2025-12-15 22:02 UTC, lasting 11 h 22 min; a fix was implemented, but no cause was stated. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2025-12-15 10:39 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/wnb1qrp24f8b](https://stspg.io/wnb1qrp24f8b)
- [Company: Pinecone](https://rewindex.com/company/pinecone.md)
- Versions: before (none: first archived) → after incident\_version:35/ksj7pvjgtjlj@cd7095f0310d
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ [Serverless][GCP][europe-west4] 5xx errors on read and write operations for some indexes
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2025-12-15 10:39 UTC
```

**5. Added: Resolved time**

```diff
+ 2025-12-15 22:02 UTC
```

**6. Added: Affected components**

```diff
+ GCP europe-west4, Serverless Indexes - GCP europe-west4
```

**7. Added: Update** (investigating) · 2025-12-15 10:39 UTC

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

**8. Added: Update** (identified) · 2025-12-15 14:34 UTC

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

**9. Added: Update** (monitoring) · 2025-12-15 21:20 UTC

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

**10. Added: Update** (resolved) · 2025-12-15 22:02 UTC

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

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2025-12-15 10:39 UTC | Major incident: \[Serverless\]\[GCP\]\[europe-west4\] 5xx errors on read and write operations for some indexes (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/i6dd2b8219871ed · Markdown: https://rewindex.com/change/i6dd2b8219871ed.md · JSON: https://rewindex.com/api/v1/changes/i6dd2b8219871ed · Generated 2026-10-18T02:54:37.850Z