Zonos experienced a minor incident on January 6, 2025 affecting International Checkout, lasting 1d 6h. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Feb 13, 2025, 08:30 PM UTC
We are currently investigating this issue.
- resolved Feb 13, 2025, 08:31 PM UTC
This incident has been resolved.
- postmortem Feb 13, 2025, 08:38 PM UTC
**What products were affected and what was the impact?** * All Magento Checkout merchants Impact: * Partial Outage **What timeframe did this issue occur?** | | **Date** | **Time** | | --- | --- | --- | | From: | Jan 6, 2025 | 2:27 PM MST | | To: | Jan 7, 2025 | 09:11 AM MST | ### How was the issue detected? Our team was notified that carts were not being created for some Magento shoppers, leading to an immediate investigation by the engineering team. ### What functionality was affected? The checkout process for Magento merchants encountered validation failures due to incorrect UUID handling. This disrupted the checkout flow, impacting merchants using the Magento Checkout. ### What problems did this cause? * Magento merchants experienced disruptions in checkouts being loaded at times. ### What was the resolution of the problem and steps that are being taken for continued follow-up? * The issue was identified as stemming from changes made to TSID validation. * A rollback of the problematic changes was performed promptly, restoring checkout functionality. * A synthetic test was created to validate UUID behavior and detect future occurrences of this issue. * Code annotations have been added to document known issues and improve future debugging. ### What mitigation solutions will we put in place to prevent this issue from occurring in the future? * Establishing alerts detecting deviations in carts-to-checkout sessions. This will help flag potential checkout issues early. * Increasing test coverage to identify gaps in synthetic testing.