AWS Status

Claude Fable 5 and Claude Mythos 5 models remain unavailable for all users in all regions. We are resolving this Health event. For further details please view the <a href="https://www.anthropic.com/news/fable-mythos-access">Anthropic statement</a>.

Between 5:50 PM and 7:15 PM PDT, we experienced connectivity issues that may have impacted Internet performance for some customers in the SA-EAST-1 Region. During this time, connectivity to instances and services within the Region was not affected. Our engineering team was automatically engaged at 5:51 PM PDT and immediately began investigating the issue. We identified the root cause and implemented a fix, which mitigated the issue at 7:15 PM PDT. The issue has been resolved and the service is operating normally.

Between 4:00 PM and 4:46 PM, we experienced increased error rates for the Route53 APIs. This issue did not impact resolution of existing DNS records. Engineers were automatically engaged and immediately began investigating the issue. During this time, customers may have received 500s for Route53 APIs and the Route53 Management Console. We have identified the root cause and have mitigated this issue. Other AWS Services that call the Route53 APIs in their workflows may also have been impacted during this time. We recommend retrying any failed operations or stuck workflows. We do not expect this issue to reoccur. The issue has been resolved and the service is operating normally.

Starting May 7 4:20 PM PDT, we experienced increased impaired EC2 instances and degraded EBS volumes in a single facility (data center) within a single Availability Zone (use1-az4) in the US-EAST-1 Region. The issue was caused by a thermal event resulting in a loss of power. As part of our recovery effort, we shifted traffic away from the impacted Availability Zone for most services at May 7 5:06 PM. AWS services, like Elastic Load Balancing, Elastic Kubernetes Service, ElastiCache, Redshift, OpenSearch, Managed Streaming for Apache Kafka among others, that depend on the affected EC2 instances and EBS volumes in this Availability Zone, also experienced elevated error rates and latencies for some workflows and/or configurations. Our main effort during the event mitigation strategy was to bring back our cooling systems capacity. By May 8 1:50 PM, we were able to stabilize cooling system capacity to pre-event levels, which helped us to restore the majority of the impaired EC2 instances and EBS volumes. A small number of instances and EBS volumes remain impaired and we continue to work to recover all affected remaining resources. We will communicate with customers who are still impacted via the Your Account view of the AWS Health Dashboard. Customers that require further assistance with this event may contact AWS Support through the AWS Management Console or the AWS Support Center.

Between 3:58 AM and 4:40 AM PDT, we experienced increased error rates and increased launch failures for EC2 instances in a single Availability Zone (euw3-az2) in the EU-WEST-3 Region. During this time, customers attempting to launch new EC2 instances in the affected Availability Zone would have experienced launch failures. Additionally, a subset of existing EC2 instances and EBS volumes in this Availability Zone were impacted and became unreachable. We have identified the root cause to be a loss of power to infrastructure within the affected Availability Zone. Engineers were engaged at 4:02 AM and immediately began working to restore power and assess the scope of impact. By 4:20 AM, power was successfully restored to the affected infrastructure. We then focused our efforts on recovering impacted EC2 instances and EBS volumes. By 4:40 AM, all impacted EC2 instances and EBS volumes had been fully recovered and were operating normally. No additional action is required for EC2 instances and EBS volumes that were impacted during the power loss event, as these have been fully recovered. While EC2 and EBS have recovered, some AWS services may take additional time to fully recover as they process backlogs and complete their own recovery procedures. The issue has been resolved and the service is operating normally.

Between 11:27 AM and 12:20 PM PST we experienced substantial error rates for S3 PUT/GET requests in EU-CENTRAL-2 Region. Engineers were engaged immediately based on automated alarming. We identified the root cause as an issue with a subsystem responsible for assembling objects bytes in storage. At 12:04 PM PST, we implemented mitigations and began observing early signs of recovery for S3. Error rates continued to improve, and other AWS Services continued to recover until 12:50 PM PST when we observed full recovery. We continue to work toward backfilling Cloudwatch logs, and expect that to continue over the next couple hours. We recommend customers retry any failed requests. The issue has been resolved and all services are operating normally.

We are providing an update on the ongoing service disruption. The Middle East (Bahrain) Region (ME-SOUTH-1) has suffered damage due to the conflict in the Middle East and is currently unavailable. Customers should recover their resources in other Regions from remote backups. Relevant billing operations are currently suspended while we restore normal operations in this AWS Region. This process is expected to take several months.

We are providing an update on the ongoing service disruption. The Middle East (UAE) Region (ME-CENTRAL-1) has suffered damage as a result of the conflict in the Middle East and is currently unable to reliably support customer applications. While some workloads continue to function normally, we strongly recommend customers migrate all accessible resources to other Regions and restore inaccessible resources from remote backups as soon as possible. Relevant billing operations are currently suspended while we restore normal operations in this AWS Region. This process is expected to take several months.

Between 7:00 AM and 12:05 PM PST, we experienced errors while publishing EC2 instance metrics and status checks in the US-EAST-1 Region. This issue resulted in metrics and status checks to be delayed or report INSUFFICIENT_DATA. EC2 APIs and instances were unaffected by this issue and continue to operate normally. We were automatically engaged at 7:05 AM and began identifying multiple parallel paths to mitigate the issue. By 7:20 AM, we identified that the issue was related to an underlying subsystem responsible for publishing EC2 metric data to CloudWatch. By 12:03 PM, we completed our mitigation efforts and observed full recovery at 12:05 PM. New metrics are being published as expected. Delayed metrics are in the process of backfilling and may take a few hours to fully complete. The issue has been resolved and the service is operating normally.

Between 11:41 AM PST and 5:45 PM PST, we experienced connectivity issues for some AWS Direct Connect Customers in the US-EAST-1 Region. While the issue was introduced at 11:41 AM PST, impact was limited until approximately 1:30 PM PST when impact grew as a result of a subsystem deployment. Our automated deployment takes approximately 12 hours so impact stayed limited to a subset of customers until we began observing broader impact at approximately 3:00 PM PST. Engineers were engaged and began identifying the root cause. By 4:45 PM PST, we had identified the root cause and began mitigating affected routes. At 5:45 PM PST, all affected routes had been re-advertised and the issue was fully mitigated. During this time, customers may have experienced issues routing between their AWS VPC resources in N.Virginia (US-EAST-1) and their on-premise environments. We do not expect this issue to reoccur. The issue has been resolved and the service is operating normally.