Increased timeouts due to surge in anonymous users

We are investigating reports of impacted performance for some GitHub services.

We are debugging a spike in anonymous traffic. Some users who are not logged in may see errors on the site. CI jobs and release downloads may fail with a 504 Gateway Timeout status if they make anonymous calls.

The degradation has been mitigated. We are monitoring to ensure stability.

The problem with anonymous traffic receiving 504 status codes has been mitigated. We are continuing to observe for an abundance of caution.

We have observed a repeated increase in 504 errors for anonymous and unauthenticated traffic, including users who are not logged in and release downloads. We are continuing to investigate and apply mitigations.

We are continuing to observe high rates of 504 errors for anonymous requests. We are continuing to work on mitigation. Logged-in users and authenticated requests are unaffected.

Error rates have declined again, and we’re preparing targeted traffic controls while monitoring for a recurrence. Logged-in users and authenticated requests have not been affected.

The degradation has been mitigated. We are monitoring to ensure stability.

We are resolving this incident as error rates have remained low and we have prepared additional protections.