登录和发布资产下载中断

2026年8月12日至13日，由于异常流量模式反复使处理此类请求的部分基础设施过载，导致对github.com的一些匿名（未登录）请求在加载登录页面等页面及下载发布资产时遭遇HTTP 5xx错误。影响时段共有三个窗口：（1）8月12日16:34至18:34 UTC，平均错误率为16.16%，峰值达到28.6%；（2）8月12日19:00至22:56 UTC，平均错误率为16.55%，峰值达到24.18%；（3）8月13日06:19至08:05 UTC，平均错误率为2.01%，峰值达到7.49%。<br />已登录用户的请求未受影响。<br /><br />我们通过在网络边缘应用流量控制措施，限制任何符合先前识别模式的请求，从而防止系统过载，缓解了这些事件。<br /><br />自这些事件发生后，我们已加强监控系统，以警示影响未登录流量的服务器端错误。同时，我们也在努力进一步加强边缘保护，并缩短检测和缓解类似事件的时间。

原文On August 12 and 13, 2026, some anonymous (logged-out) requests to github.com experienced HTTP 5xx errors when loading pages like the sign-in page, and when downloading release assets, due to an unusual traffic pattern that repeatedly overloaded a part of our infrastructure that serves these types of requests. There were three windows of impact: (1) August 12 from 16:34 to 18:34 UTC, with an average error rate of 16.16% that peaked at 28.6%; (2) August 12 from 19:00 to 22:56 UTC, with an average error rate of 16.55% that peaked at 24.18%; and (3) August 13 from 06:19 to 08:05 UTC, with an average error rate of 2.01% that peaked at 7.49%.<br />Requests from signed-in users were unaffected.<br /><br />We mitigated the incidents by applying traffic controls at our network edge that limited any requests matching the pattern identified previously, thereby preventing overload on our systems.<br /><br />Since these incidents occurred, we have tightened our monitoring systems to alert server-side errors that affect logged-out traffic. We are also working to further strengthen our edge protections and reduce the time to detect and mitigate similar incidents.

我们已确定根本原因，并正在着手缓解。登录页面及下载发布资源时的错误已有所减少，但尚未完全解决。我们将持续提供更新。

原文We have identified the root cause and are working on mitigation. Errors on the login page and downloading release assets have decreased, but we are not fully mitigated. We will continue to provide updates.

我们正在调查登录及下载发布资源时遇到的问题。我们将持续向用户通报缓解措施的进展。

原文We are investigating issues with Login and when downloading Release Assets. We will continue to keep users updated on progress towards mitigation.

我们正在调查部分GitHub服务性能受影响的相关报告。

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