Customers may have experienced temporary unavailability when accessing multiple shops. During the incident, affected shops returned HTTP 503 errors while AWS performed scheduled maintenance on the underlying database infrastructure.
Because the affected databases used a single instance, the maintenance temporarily interrupted database connectivity and caused the affected application pods to become unavailable.
Timing
September 27, 2026, 23:45–23:48 UTC (September 28, 2026, 01:45–01:48 CEST)
Resolution
The AWS maintenance was completed, after which the affected databases and application pods recovered automatically. All services have been restored, and no further impact has been observed.
Follow-up improvement
We plan to strengthen database redundancy for live applications to improve resilience and reduce the potential impact of similar maintenance activities in the future.
