# Pinecone: [Serverless][AWS][us-east-1] 5xx errors on write operations for some indexes

- Impact (vendor’s label): major
- Status: resolved
- Started: 2025-09-09 12:55 UTC · Resolved: 2025-09-09 14:40 UTC · Duration: 1.8 h
- Updates: 3 · Affected components: AWS us-east-1, Serverless Indexes - AWS us-east-1
- [Vendor status page: https://stspg.io/npclygbpw9n9](https://stspg.io/npclygbpw9n9)
- [Company: Pinecone](https://rewindex.com/company/pinecone.md)

## Summary

Pinecone reported a major incident causing 5xx errors on write operations for some Serverless indexes in AWS us-east-1. It started at 2025-09-09 12:55 UTC and was resolved at 2025-09-09 14:40 UTC, lasting 1 h 44 min; a fix was implemented at 09-09 13:43 UTC. _(machine-written, sol)_
## Timeline of updates

- **investigating** 2025-09-09 12:55 UTC: We are currently investigating this issue.
- **monitoring** 2025-09-09 13:43 UTC: A fix has been implemented and we are monitoring the results.
- **resolved** 2025-09-09 14:40 UTC: This incident has been resolved.

## Rewindex changes for this incident

- 2025-09-09 12:55 UTC: [Major incident: \[Serverless\]\[AWS\]\[us-east-1\] 5xx errors on write operations for some indexes](https://rewindex.com/change/i2af5a8f68f3035.md)


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Canonical: https://rewindex.com/company/pinecone/incidents/7c1l7n8dbw80 · Markdown: https://rewindex.com/company/pinecone/incidents/7c1l7n8dbw80.md · JSON: https://rewindex.com/api/v1/companies/pinecone/incidents/7c1l7n8dbw80 · Generated 2026-10-18T11:27:39.915Z