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Date	Provider	Score	Summary
19 Aug 2026, 7:40 PM	The Register	7.5	GitHub blames 8-hour outage on autoscaling fail and VS Code retry storm GitHub traced a near 8-hour outage (Aug 17, 13:28–21:15 UTC) to saturated load balancers in its Central US facility after an Istio sidecar hit its concurrency limit and a misconfigured autoscaling policy failed to respond. A latent VS Code retry bug amplified traffic ~10x against the Copilot Token Service, which took until 21:02 UTC to recover—long after Issues, PRs, APIs, and Actions came back. Why: If you ship CI/CD or AI-assisted workflows on GitHub Actions or Copilot, this incident shows a single internal endpoint + client retry loop can take down your pipeline for hours. Consider caching dependencies locally, maintaining a fallback CI provider, and reviewing your own autoscaling policies to ensure sidecar/agent concurrency limits—not just host metrics—are monitored. github outage-postmortem copilot istio autoscaling retry-storm

Date

Provider

Score

Summary

19 Aug 2026, 7:40 PM

The Register

7.5

GitHub blames 8-hour outage on autoscaling fail and VS Code retry storm

GitHub traced a near 8-hour outage (Aug 17, 13:28–21:15 UTC) to saturated load balancers in its Central US facility after an Istio sidecar hit its concurrency limit and a misconfigured autoscaling policy failed to respond. A latent VS Code retry bug amplified traffic ~10x against the Copilot Token Service, which took until 21:02 UTC to recover—long after Issues, PRs, APIs, and Actions came back.

Why: If you ship CI/CD or AI-assisted workflows on GitHub Actions or Copilot, this incident shows a single internal endpoint + client retry loop can take down your pipeline for hours. Consider caching dependencies locally, maintaining a fallback CI provider, and reviewing your own autoscaling policies to ensure sidecar/agent concurrency limits—not just host metrics—are monitored.