Codespaces creation failling
This summary is created by Generative AI and may differ from the actual content.
Overview
On October 20, 2025, between 08:05 UTC and 10:50 UTC, the GitHub Codespaces service experienced degradation, leading to failures in creating new codespaces and resuming existing ones. This incident was caused by a cascading failure originating from an outage in a critical 3rd-party dependency responsible for building devcontainer images. The service recovered once the 3rd-party dependency was restored. GitHub is planning to reduce the criticality of this dependency and enhance monitoring and alerting systems.
Impact
The Codespaces service was degraded for 2 hours and 45 minutes. Users experienced an average error rate of 39.5% (peaking at 71%) for codespace creation and an average error rate of 23.4% (peaking at 46%) for resuming existing codespaces.
Trigger
The incident was triggered by a cascading failure caused by an outage in a 3rd-party dependency that is required for building devcontainer images.
Detection
The incident was detected through increased error rates observed across Codespaces operations, affecting both creation and resumption, which prompted an investigation into reports of degraded availability.
Resolution
The incident was resolved when the 3rd-party dependency, which was the root cause of the outage, recovered, thereby mitigating the impact on the Codespaces service.
Root Cause
The root cause was a cascading failure initiated by an outage in a 3rd-party dependency that is a critical component in the process of building devcontainer images for Codespaces.