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Some EC2 instances in AWS us-east-2(Ohio) may experienced the loss of power issue this morning due to affected AWS Availability Zone. Currently, power has been restored and the majority of the affected EC2 instances have recovered and the rest is expected to recover within one hour.
Attached is the Instance Impairments Statement from AWS:
[10:49 AM PDT] We continue to see recovery of EC2 instances that were affected by the loss of power in a single Availability Zone in the US-EAST-2 Region. At this stage, the vast majority of affected EC2 instances and EBS volumes have returned to a healthy state and we continue to work on the remaining EC2 instances and EBS volumes. Elastic Load Balancing has shifted traffic away from the affected Availability Zone. Single-AZ RDS databases were also affected and will recover as the underlying EC2 instance recovers. Multi-AZ RDS databases would have mitigated impact by failing away from the affected Availability Zone. While the vast majority of Lambda functions continue operating normally, some functions are experiencing invocation failures and latencies, but we expect this to improve over the next 30 minutes. Power has been restored to all affected resources and remains stable. We expect the recovery of EC2 instances and EBS volumes to continue to improve over the next 45 minutes. For customers that need immediate recovery, we recommend failing away from the affected Availability Zone as other Availability Zones are not affected by this issue.
[10:25 AM PDT] We can confirm that some instances within a single Availability Zone (USE2-AZ1) in the US-EAST-2 Region have experienced a loss of power. The loss of power is affecting part of a single data center within the affected Availability Zone. Power has been restored to the affected facility and at this stage the majority of the affected EC2 instances have recovered. We expect to recover the vast majority of EC2 instances within the next hour. For customers that need immediate recovery, we recommend failing away from the affected Availability Zone as other Availability Zones are not affected by this issue.
[10:11 AM PDT] We are investigating network connectivity issues for some instances and increased error rates and latencies for the EC2 APIs within the US-EAST-2 Region.
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