imgix: Quality degradation for a small portion of rendered images in the EU
Timeline of updates
- resolved
A small percentage of image requests served by a single machine in the EU region experienced quality degradation between December 9th, 11:08 AM UTC - December 10th, 6:38 AM UTC
- postmortem
# Timeframe December 9th, 11:08 AM UTC - December 10th, 6:38 AM UTC # Impact A small percentage of image requests served by a single machine in the EU region experienced quality degradation. # Root Cause A hardware failure on one of the rendering machines resulted in images with artifacts being delivered to users. # Contributing Factors An absence of automated testing for faulty renders across active machines caused assets to be cached undetected. The lapse between when the issue was detected and when the issue began culminated in an unknown number of renders that needed to be purged from the cache. Along with inadequate cache tooling for purging affected images, these factors caused the issue to fully resolve in a longer timeframe than expected. # Corrective Actions To prevent this issue from happening in the future, we will: * Investigate and implement automated image quality testing for active rendering machines * Replace and refresh machines on a more frequent basis to minimize impact of single machine failures * Upgrade cache tooling for targeted issue resolution
Archive proof
Rewindex commits each version of an incident it captures to a daily checkpoint, chains it to the day before, and has the checkpoint timestamped by FreeTSA and DigiCert. That proves this record existed by then and has not been changed since, by anyone, Rewindex included.
How the archive is checked, and what it cannot prove.
First version captured 18:53 UTC
In the 2026-10-19 checkpoint, timestamped by FreeTSA and DigiCert on Oct 20, 00:41 UTC. Record hash
3cf54ecc83f97fc3…
Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab).