# Statsig: Major incident: 5xx Spike for Client SDK Initialization

**Summary:** Statsig reported a major 5xx spike affecting Client SDK Initialization and Config Delivery API - US East 1, starting at 2025-07-18 15:10 UTC and resolved at 2025-07-18 15:21 UTC (11 min). Statsig shifted traffic to restore service and identified a GCP outage as the root cause. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2025-07-18 15:10 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/mt0m684j3zt7](https://stspg.io/mt0m684j3zt7)
- [Company: Statsig](https://rewindex.com/company/statsig.md)
- Versions: before (none: first archived) → after incident\_version:208/ynw3lf9n55nj@bcc2eb21f097
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ 5xx Spike for Client SDK Initialization
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2025-07-18 15:10 UTC
```

**5. Added: Resolved time**

```diff
+ 2025-07-18 15:21 UTC
```

**6. Added: Affected components**

```diff
+ Config Delivery API - US East 1, US East 1
```

**7. Added: Update** (investigating) · 2025-07-18 15:10 UTC

```diff
+ At approximately, 8:10AM PST, we detected a growing rate of 5xx in our US East region. We have shifted traffic, and expect things to recover fully in a few minutes. Mitigated: 07/18/2025 08:21:00 GMT-0700 (Pacific Daylight Time): The traffic shift has completed and things should be recovered. Update: 10:49AM PST, the rootcause was identified to be a GCP Outage: https://status.cloud.google.com/incidents/8cY8jdUpEGGbsSMSQk7J
```

**8. Added: Update** (resolved) · 2025-07-18 15:21 UTC

```diff
+ Resolved.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2025-07-18 15:10 UTC | Major incident: 5xx Spike for Client SDK Initialization (this change) | outage |

All Statsig changes: [timeline](https://rewindex.com/company/statsig/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/iea178d6f6e4a2e · Markdown: https://rewindex.com/change/iea178d6f6e4a2e.md · JSON: https://rewindex.com/api/v1/changes/iea178d6f6e4a2e · Generated 2026-10-18T02:55:10.407Z