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Outage in AWS

Increased Error Rates - Zurich

Resolved Minor
March 07, 2026 - Started about 1 month ago - Lasted about 1 hour

Incident Report

Summary AI Generated

AWS experienced increased error rates in the EU-CENTRAL-2 (Zurich) region for 1.2 hours, primarily caused by substantial error rates for PUT and GET requests to Amazon S3 due to issues with a subsystem responsible for assembling objects from bytes in storage. The incident affected numerous AWS services including EC2, Lambda, CloudWatch, and many others that depend on S3, though existing EC2 instances remained unaffected. AWS engineers implemented mitigations and observed early signs of recovery after triangulating the root cause.

We are investigating increased error rates in the EU-CENTRAL-2 Region.
Components affected
Amazon Athena Amazon Athena (eu-central-2) Amazon EC2 Amazon EC2 (eu-central-2) AWS AppSync AWS AppSync (eu-central-2) Amazon SageMaker Amazon SageMaker (eu-central-2) AWS AppConfig AWS AppConfig (eu-central-2) AWS Batch AWS Batch (eu-central-2) AWS DataSync AWS DataSync (eu-central-2) Amazon S3 Amazon S3 (eu-central-2) Amazon Managed Streaming for Apache Kafka Amazon Managed Streaming for Apache Kafka (eu-central-2) AWS Application Migration Service AWS Application Migration Service (eu-central-2) AWS Client VPN AWS Client VPN (eu-central-2) AWS CloudTrail AWS CloudTrail (eu-central-2) AWS KMS AWS KMS (eu-central-2) AWS Transit Gateway AWS Transit Gateway (eu-central-2) AWS Storage Gateway AWS Storage Gateway (eu-central-2) AWS Transfer Family AWS Transfer Family (eu-central-2) AWS VPCE PrivateLink AWS VPCE PrivateLink (eu-central-2) Amazon ECS Amazon ECS (eu-central-2) AWS Cloud Map AWS Cloud Map (eu-central-2) AWS Fargate AWS Fargate (eu-central-2) Amazon ECR Amazon ECR (eu-central-2) Amazon EKS Amazon EKS (eu-central-2) Amazon Kinesis Data Streams Amazon Kinesis Data Streams (eu-central-2) Amazon Kinesis Firehose Amazon Kinesis Firehose (eu-central-2) Amazon OpenSearch Service Amazon OpenSearch Service (eu-central-2) Amazon Route 53 AWS CodeDeploy AWS CodeDeploy (eu-central-2) AWS Lambda AWS Lambda (eu-central-2) Amazon CloudWatch Amazon CloudWatch (eu-central-2) Amazon ELB Amazon ELB (eu-central-2) Amazon Glacier Amazon Glacier (eu-central-2) AWS Glue AWS Glue (eu-central-2)

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Latest Updates ( sorted recent to last )
UPDATE about 1 month ago - at 03/07/2026 08:28PM

We are seeing early signs of recovery and continue to monitor and work toward full recovery.

UPDATE about 1 month ago - at 03/07/2026 08:17PM

We can confirm substantial error rates for PUT and GET requests to Amazon S3 in the EU-CENTRAL-2 Region. Engineers engaged immediately based on automated alarming. We have triangulated the issue to a subsystem responsible for assembling objects from bytes in storage. We have begun implementing mitigations, and are observing some improvement in error rates. We continue to work to identify the root cause, and are working on multiple parallel paths to fully mitigate the issue. Other AWS Services (such as EC2 launches) that rely on S3 are also affected by this issue. Existing EC2 instances are unaffected by this issue. We will provide another update by 12:45 PM PST, or sooner if we have additional information to share.

UPDATE about 1 month ago - at 03/07/2026 07:53PM

We are investigating increased error rates in the EU-CENTRAL-2 Region.

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