Workers Smart Placement Causing Request Failures in Eastern Europe

HTTP/3 performance regression

Starting as early as at least 2022-10-26, users may experience a significant performance degradation when enabling HTTP/3 on their sites. Users are advised to disable HTTP/3 for better performance.

Update: Improvements have been made to HTTP/3 performance recently that greatly reduce the impact of this regression.

Sources:

Incident Report for Cloudflare

Resolved

This incident is now resolved.

Posted Oct 01, 2024 - 22:52 UTC

Monitoring

A fix for this issue has been identified and implemented. We are currently monitoring the results.

Posted Oct 01, 2024 - 22:39 UTC

Investigating

Cloudflare Workers with the Smart Placement feature enabled will have failing requests in the OTP colo (Eastern Europe) since Oct 1, 18:00 UTC. We are working on a fix, but impact can be immediately mitigated by turning off Smart Placement https://developers.cloudflare.com/workers/configuration/smart-placement/

Posted Oct 01, 2024 - 22:08 UTC

This incident affected: Cloudflare Sites and Services (Workers).

Unofficial and Honest Cloudflare System Status