# Confluent: Major incident: Elevated error rates and latency on produce and consume operations on AWS us-east-1 AZ4

**Summary:** Confluent Cloud reported a major incident affecting produce/consume operations in AWS us-east-1 AZ4, with elevated errors, latency and lingering connectivity issues. It started 2026-05-08 01:14 UTC and resolved 2026-06-04 16:47 UTC, lasting 27 days 15 h. Confluent attributed the initial impact to EC2 power loss during a thermal event and confirmed full operation at resolution. _(machine-written, sol)_
- Kind: Major incident · Label: degradation (model (Jev))
- Changed: 2026-05-08 01:14 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/br3hbb97ft7r](https://stspg.io/br3hbb97ft7r)
- [Company: Confluent](https://rewindex.com/company/confluent.md)
- Versions: before (none: first archived) → after incident\_version:139/5r69blxpvzn3@5e66ab276d37
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Elevated error rates and latency on produce and consume operations on AWS us-east-1 AZ4
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-05-08 01:14 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-06-04 16:47 UTC
```

**6. Added: Affected components**

```diff
+ Confluent Cloud
```

**7. Added: Update** (investigating) · 2026-05-08 01:14 UTC

```diff
+ We are investigating data plane impact (produce/consume) resulting from elevated error rates and latencies from AWS us-east-1 resources in AZ4. EC2 instances hosted on this availability zone are impaired by loss of power during an ongoing thermal event.
```

**8. Added: Update** (monitoring) · 2026-05-08 01:55 UTC

```diff
+ We are monitoring the health of impacted brokers in the affected availability zone. More details about the thermal event on the AWS status page: https://health.aws.amazon.com/health/status
```

**9. Added: Update** (monitoring) · 2026-05-09 13:19 UTC

```diff
+ AWS has resolved the underlying infrastructure issue in us-east-1 (use1-az4). The majority of Confluent Cloud services have recovered and are operating normally. We are continuing to monitor for any lingering effects and verifying full service restoration.
```

**10. Added: Update** (monitoring) · 2026-05-12 18:51 UTC

```diff
+ AWS has reported the underlying infrastructure issue in us-east-1 (use1-az4) as resolved. However, some Confluent Cloud customers in the affected availability zone continue to experience connectivity issues.  Confluent is actively investigating and working to restore full connectivity for impacted customers.
```

**11. Added: Update** (resolved) · 2026-06-04 16:47 UTC

```diff
+ The incident has been resolved and us-east-1 (use1-az4) is fully operational.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-05-08 01:14 UTC | Major incident: Elevated error rates and latency on produce and consume operations on AWS us-east-1 AZ4 (this change) | degradation |

All Confluent changes: [timeline](https://rewindex.com/company/confluent/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/i4534fd33a396f4 · Markdown: https://rewindex.com/change/i4534fd33a396f4.md · JSON: https://rewindex.com/api/v1/changes/i4534fd33a396f4 · Generated 2026-10-18T02:54:52.802Z