Changes / Confluent / Elevated error rates and latency on produce and consume operations on AWS us-east-1 AZ4

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 from the diff below (Sol; type: incident degradation). Check the diff before relying on it.

Major incidentLabel: degradation (model (Jev), 50%)Changed Detected Source: stspg.io (opens in new tab)

What changed

AddedTitle#1
Before: not present
After: Elevated error rates and latency on produce and consume operations on AWS us-east-1 AZ4
AddedImpact#2
Before: not present
After: major
AddedStatus#3
Before: not present
After: resolved
AddedStart time#4
Before: not present
After: 2026-05-08 01:14 UTC
AddedResolved time#5
Before: not present
After: 2026-06-04 16:47 UTC
AddedAffected components#6
Before: not present
After: Confluent Cloud
AddedUpdateinvestigating#7
Before: not present
After: 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.
AddedUpdatemonitoring#8
Before: not present
After: 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
AddedUpdatemonitoring#9
Before: not present
After: 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.
AddedUpdatemonitoring#10
Before: not present
After: 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.
AddedUpdateresolved#11
Before: not present
After: The incident has been resolved and us-east-1 (use1-az4) is fully operational.

First version of this incident archived by Rewindex. View the live incident (opens in new tab).

History of this incident

When (UTC)ChangeKind
Major incident: Elevated error rates and latency on produce and consume operations on AWS us-east-1 AZ4 (this change)
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.
Major incident

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