awsDynamoDB endpoint DNS resolution failure in us-east-1
Started
Oct 20, 2025, 6:48 AM UTC
Resolved
Oct 20, 2025, 10:01 PM UTC
Duration
15h 13m
Services impacted
1
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Impact
A race condition in DNS management automation emptied the dynamodb.us-east-1.amazonaws.com record, cascading into EC2 launches, Lambda, and NLB health checks for ~15 hours.
Affected services (1)
Affected regions
Timeline
- Resolved
All services returned to normal operation.
- Monitoring
DNS restored; DynamoDB recovering. Dependent services (EC2 launches, NLB health checks) still impaired.
- Identified
Root cause identified: the endpoint DNS record was emptied by DNS management automation. Manual restoration underway.
- Investigating
Elevated error rates for DynamoDB requests in us-east-1; DNS resolution of the regional endpoint implicated.
Resolution
All services returned to normal operation.