AWS experienced elevated EC2 Launch Template API error rates in the US-East-1 (N. Virginia) region for approximately 2.2 hours, beginning at 2:56 AM PDT on July 6, 2026. The root cause was a congestion issue within an EC2 internal subsystem handling launch template workflows, which also disrupted Amazon EKS customers attempting to create or update clusters, or scale nodes via Managed Node Groups, EKS Auto Mode, or Karpenter — though existing clusters and nodes remained unaffected. Engineers identified the issue, pursued multiple mitigation paths, and observed initial signs of recovery, advising customers to retry any failed requests during the impact window.
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We are seeing initial signs of recovery and continue to work toward full recovery.
Starting at 2:56 AM PDT, we began experiencing increased error rates when calling EC2 Launch Template APIs in the US-EAST-1 Region. Our engineers have been engaged and are actively working to mitigate the impact. Additionally, Amazon Elastic Kubernetes (EKS) customers may experience errors when creating or updating clusters, or when launching and scaling nodes via Managed Node Groups, EKS Auto Mode, or Karpenter; this issue does not impact existing clusters and nodes. We have identified the root cause to be a congestion issue within an EC2 internal subsystem responsible for processing EC2 launch template workflows. We are pursuing multiple mitigation paths. We recommend that customers retry any failed requests during the impact window. While we do not currently have an ETA for full recovery, we are prioritizing this issue and will provide another update by 7:15 AM PDT or sooner if we have additional information to share.
We are investigating increased error rates when calling EC2 Launch Template APIs in US-EAST-1 Region. During this time, affected customers may experience errors when creating, modifying, or referencing launch templates. Other AWS services that rely on launch templates may also be impacted. We will provide another update by 6:30 AM PDT or sooner, if we have additional information to share.
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