Contentstack - Azure NA - Cache Server Engine Failure

Incident Report for Contentstack

Resolved

A scheduled cache server engine upgrade caused the Contentstack Web Application to become unavailable from 08:00 AM to 09:30 AM UTC on Jan 26, 2026, affecting user login and application operations. The cache server became unresponsive during a planned backup operation, exhibiting unexpected behavior that was not observed during similar upgrades in other regions and environments.

To resolve the issue, the engine upgrade was rolled back and traffic was redirected to the stable version, fully restoring service functionality. We are currently working with the hyperscalers to identify the root cause and are simultaneously analyzing our internal procedures to improve the overall operational process for future upgrades.

Posted Jan 26, 2026 - 01:00 MST