GitHub Availability Report: September 2020
GitHub has published its availability report for September 2020, detailing a single incident that significantly degraded the GitHub Pages service.
Incident: September 17, 15:50 UTC (duration: 4 hours 24 minutes)
The problem began when one node responsible for serving GitHub Pages sites became unresponsive to new builds. Crucially, the node remained online and continued to serve requests, so the system did not automatically remove it from service. As a result, builds directed to that node failed until engineers manually disabled it. GitHub plans to address this gap by implementing automatic remediation for such failures and ensuring builds are retried on a different node when possible.
Summary
GitHub says it will continue to share updates on reliability improvements. More technical details are available on the GitHub engineering blog.
