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GitHub: Incident with multiple GitHub services
Timeline of updates
- resolved
On June 17, 2025, between 19:32 UTC and 20:03 UTC, an internal routing policy deployment to a subset of network devices caused reachability issues for certain network address blocks within our datacenters. Authenticated users of the github.com UI experienced 3-4% error rates for the duration. Authenticated callers of the API experienced 40% error rates. Unauthenticated requests to the UI and API experienced nearly 100% error rates for the duration. Actions service experienced 2.5% of runs being delayed for an average of 8 minutes and 3% of runs failing. Large File Storage (LFS) requests experienced 0.978% errors. At 19:54 UTC, the deployment was rolled back, and network availability for the affected systems was restored. At 20:03 UTC, we fully restored normal operations. To prevent similar issues, we are expanding our validation process for routing policy changes.
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