GitHub Outage History

GitHub experienced degraded performance affecting their Webhooks APIs and UI for 19 minutes. The issue impacted webhook functionality across the platform. The degradation was mitigated and the incident was resolved with ongoing monitoring to ensure system stability.

GitHub experienced degraded performance affecting Git Operations, API Requests, Issues, and Pull Requests for 1.2 hours. Users reported slow response times across these core GitHub services during the incident. The issue was resolved and GitHub indicated a detailed root cause analysis would be provided.

GitHub experienced degraded performance affecting Copilot services for 57 minutes. The issue was mitigated and resolved, with GitHub monitoring the system to ensure stability before declaring the incident fully resolved.

GitHub experienced a major incident affecting Actions and Pages services for 2.4 hours due to authentication issues. The problems caused failures in starting Actions runs and downloading actions, with the majority of Actions runs impacted along with Pages functionality. The authentication issues were identified and mitigated, with full resolution confirmed after monitoring for stability.

GitHub experienced intermittent authentication failures affecting app installation tokens for approximately 3.7 hours, with roughly 1% of tokens impacted. The issue caused elevated error rates for services relying on app installation token authentication. The incident was gradually mitigated through applied fixes and monitoring, with full resolution confirmed after ensuring the issue did not reoccur.

GitHub Actions experienced degraded performance for 3.3 hours, with a subset of runners taking longer than expected to connect and causing delays in job execution and queuing. The service applied mitigations to resolve the connectivity and queuing issues, with customer impact fully subsiding before deploying a permanent fix. The incident was resolved after monitoring confirmed stability and full recovery.

GitHub Actions experienced degraded availability for 38 minutes, which also caused downstream issues affecting GitHub Pages, GitHub Coding Agent, and GitHub Code Review Agent. The degradation was mitigated and the incident was fully resolved after monitoring confirmed system stability.

GitHub experienced a 1.4-hour incident affecting CodeQL, their code analysis engine used by Code Scanning. Users experienced delays and incomplete code scanning results due to performance degradation. The issue was resolved by applying mitigation measures to increase processing capacity.

GitHub experienced degraded performance affecting CodeQL, Webhooks, Actions, notifications, and Slack integration for 3.1 hours. CodeQL actions were experiencing delays and getting stuck in pending states or failing due to timeouts. The issue was traced to problems with a queuing service, which was resolved by scaling out the infrastructure, with all services gradually recovering and returning to normal operation.

GitHub experienced degraded performance and high error rates affecting Git Operations for 12 minutes. Users encountered issues when performing Git-related activities during this period. The incident was resolved after investigation and normal service was restored.