# GitHub Copilot: Critical incident: Several services are degraded

**Summary:** GitHub reported a critical outage affecting Pull Requests, Webhooks and other services, with approximately 1.16 million failed requests. The incident started at 2026-10-06 19:57 UTC and resolved at 2026-10-06 23:40 UTC, lasting 3 h 43 min. Enterprise migrations remained paused after other services recovered; GitHub reported deploying a mitigation. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-10-06 19:57 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/w3rcssslq22w](https://stspg.io/w3rcssslq22w)
- [Company: GitHub Copilot](https://rewindex.com/company/github-copilot.md)
- Versions: before (none: first archived) → after incident\_version:18/cjwszcf57bff@f33474a74e92
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Several services are degraded
```

**2. Added: Impact**

```diff
+ critical
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-10-06 19:57 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-10-06 23:40 UTC
```

**6. Added: Affected components**

```diff
+ Pull Requests, Webhooks
```

**7. Added: Update** (investigating) · 2026-10-06 19:57 UTC

```diff
+ We are investigating reports of degraded performance for Pull Requests and Webhooks
```

**8. Added: Update** (investigating) · 2026-10-06 20:04 UTC

```diff
+ Webhooks is operating normally.
```

**9. Added: Update** (investigating) · 2026-10-06 20:12 UTC

```diff
+ Pull Requests is operating normally.
```

**10. Added: Update** (investigating) · 2026-10-06 20:22 UTC

```diff
+ A number of services including issues, pull requests, and webhooks, were briefly degraded, but have now recovered. Enterprise migrations are paused while we validate causes and mitigations.
```

**11. Added: Update** (monitoring) · 2026-10-06 20:26 UTC

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

**12. Added: Update** (investigating) · 2026-10-06 20:57 UTC

```diff
+ All services are functioning normally except for enterprise migrations, which are still paused. They will resume soon.
```

**13. Added: Update** (investigating) · 2026-10-06 21:29 UTC

```diff
+ We are working towards a mitigation that will allow us to resume processing enterprise migrations.
```

**14. Added: Update** (investigating) · 2026-10-06 22:40 UTC

```diff
+ We are deploying a mitigation and plan to resume migrations shortly thereafter
```

**15. Added: Update** (resolved) · 2026-10-06 23:40 UTC

```diff
+ On October 6, 2026, from 19:44 to 19:50 UTC, GitHub experienced a service outage with elevated error rates peaking at 1.30% of all requests, totaling approximately 1.16 million failed requests. This impacted 12 services across GitHub, including Pull Requests, Webhooks, Repos, OAuth, Git over SSH, Codespaces, and Gists. The incident was triggered by GitHub Enterprise Importer (GEI) making multiple, long duration queries which saturated a database connection pool. Recovery was seen at approximately 19:50 UTC once the migration's calls stopped; GEI migrations were reenabled at 23:32 UTC after a code fix was merged.<br /><br />We have completed a detailed root-cause review and are implementing improved database-health safeguards. We will continue to review and add additional safeguards to prevent future recurrence.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-10-06 19:57 UTC | Critical incident: Several services are degraded (this change) | outage |

All GitHub Copilot changes: [timeline](https://rewindex.com/company/github-copilot/changes.md)
_Diff excerpts are shown on normalized text: dates, counters and tokens appear as ‹date›, ‹count›, ‹tok›; noise-only edits are hidden. Rewindex shows the changed passages, not a copy of the page._


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Canonical: https://rewindex.com/change/i82d07bbaf0592f · Markdown: https://rewindex.com/change/i82d07bbaf0592f.md · JSON: https://rewindex.com/api/v1/changes/i82d07bbaf0592f · Generated 2026-10-18T02:28:05.770Z