10月5日のGitHubの障害

Incident with Actions

1. 解決済み · 22:49

   On October 5, 2026, between 18:48 and 22:49 UTC, GitHub Actions and Hosted Runners experienced degraded performance. Over the full incident, 14.3% of workflow runs using GitHub-hosted runners and 26.5% of individual GitHub-hosted jobs did not start within five minutes. <br /><br /> <br />During the roughly 90-minute period of highest impact, 47.0% of workflow runs using GitHub-hosted runners failed and 71.9% of GitHub-hosted jobs did not start within five minutes, while existing Pages sites continued to serve normally. A portion of customers also encountered intermittent errors in repository lists, licensing and billing pages, and some Copilot features. Self-hosted runners were not affected. <br /><br /><br />The incident was caused by a partial networking failure that disrupted connectivity between one of our on-premises datacenter regions and a subset of cloud-hosted regional database and storage services. <br /><br /><br />We mitigated the incident by shifting database and storage traffic to healthy regions and endpoints and increasing capacity for affected compute services. GitHub Actions and Hosted Runners recovered by 21:54 UTC, and all affected services recovered by 22:49 UTC. <br /><br /> <br />We are partnering with our cloud provider to understand the network failure and identify improvements to network-path resilience, detection, and recovery for similar incidents.

2. 調査中 · 22:40

   Pages is operating normally.

3. 調査中 · 21:54

   Actions is operating normally.

4. 調査中 · 21:32

   We have applied mitigations to address GitHub Actions failures. Queued jobs are clearing, new jobs are not delayed, and we expect full runner recovery shortly. We continue to monitor for full recovery and are working to mitigate ongoing issues affecting other services, including access to repository lists, licensing, and billing pages.

5. 調査中 · 21:31

   Actions is experiencing degraded performance. We are continuing to investigate.

6. 調査中 · 21:22

   Pages is experiencing degraded performance. We are continuing to investigate.

7. 調査中 · 21:09

   In addition to ongoing issues with Actions and Hosted Runners, some customers are also unable to access repository list, licensing and billing pages within their GitHub accounts. We continue to investigate and are working on mitigation.

8. 調査中 · 20:47

   Actions is experiencing degraded availability. We are continuing to investigate.

9. 調査中 · 20:39

   We’re continuing to investigate job failures and delays affecting GitHub-hosted runner assignment and workflow start times. Our teams are actively working to mitigate the impact and will provide another update as we learn more.

10. 調査中 · 19:50

    We’re still investigating delays in assigning GitHub-hosted runners, affecting workflow start times across multiple runner configurations. Our teams are working to mitigate the impact; we’ll share another update as we learn more.

11. 調査中 · 19:15

    We’re investigating an issue causing delays when assigning GitHub-hosted runners to Actions jobs. Some workflows may take longer to start across runner configurations. Our teams are working to mitigate the issue, and we’ll provide an update as we learn more.

12. 調査中 · 19:11

    We are investigating reports of degraded performance for Actions