US - Incident with Actions

On May 27, 2025, between 09:31 UTC and 13:31 UTC, some Actions jobs experienced failures uploading to and downloading from the Actions Cache service. During the incident, 6% of all workflow runs couldn’t upload or download cache entries from the service, resulting in a non-blocking warning message in the logs and performance degradation. The disruption was caused by an infrastructure update related to the retirement of a legacy service, which unintentionally impacted Cache service availability. We resolved the incident by reverting the change and have since implemented a permanent fix to prevent recurrence.

We are improving our configuration change processes by introducing additional end-to-end tests to cover the identified gaps, and implementing deployment pipeline improvements to reduce mitigation time for similar issues in the future.

Mitigation is applied and we’re seeing signs of recovery. We’re monitoring the situation until the mitigation is applied to all affected repositories.

We are experiencing degradation with the GitHub Actions cache service and are working on applying the appropriate mitigations.

We are investigating reports of degraded performance for Actions