Incident with Actions and Pages

Severity: Major
Category: Bug
Service: GitHub

This summary is created by Generative AI and may differ from the actual content.

Overview

GitHub Actions and Pages services experienced degraded performance leading to delays in workflow runs and Pages deployments.

Impact

34% of Actions workflow runs experienced delays, and a small percentage of runs using GitHub-hosted runners failed to start. Additionally, Pages deployments for sites without a custom Actions workflow (93% of them) did not run, preventing new changes from being deployed.

Trigger

An unexpected data shape

Detection

We are investigating reports of degraded performance for Actions and Pages

Resolution

We mitigated the incident by excluding the affected pods and correcting the data that led to the crashes. We’ve fixed the source of the unexpected data shape and have improved the overall resilience of our service against such occurrences.

Root Cause

An unexpected data shape led to crashes in some of our pods.