4Schools experienced a major incident on April 6, 2026 affecting Application and CMS4Schools Mass Notifications, lasting 2h 4m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Apr 06, 2026, 02:30 PM UTC
Messages and publication of some new content on CMS4Schools are currently delayed due to a technical issue. We are currently investigating.
- monitoring Apr 06, 2026, 03:06 PM UTC
A fix has been implemented, resolving the issue with delays. We are monitoring performance and collecting data to detect and prevent this issue from happening again.
- resolved Apr 06, 2026, 04:35 PM UTC
The fix is holding. This issue is resolved. What happened: Overnight on Sunday, April 5, a routine database server upgrade was performed. A component of CMS4Schools which processes content updates was affected and silently failed. As a result, a backlog of updates accumulated until the issue was fixed this morning. Content updates that were sent during this period have now been published, and new content should appear quickly as normal. We are filling the gap in monitoring to detect this type of issue, and are implementing a more robust reconnection mechanism to prevent this problem from occurring in the future.