# Sentry: Major incident: Sentry.io elevated number of 500 errors

**Summary:** Sentry reported a major incident with elevated 500 errors affecting the API, Dashboard and listed US ingestion components from 2026-09-10 15:25 UTC to 2026-09-10 16:26 UTC, lasting 1 h 1 min. Errors appeared during migration to a new control silo region; Sentry rolled back the migration, applied fixes and confirmed full resolution. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-09-10 15:25 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/10yb4b5w2szj](https://stspg.io/10yb4b5w2szj)
- [Company: Sentry](https://rewindex.com/company/sentry.md)
- Versions: before (none: first archived) → after incident\_version:288/pkyrdl15szrp@3966f7dd2902
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Sentry.io elevated number of 500 errors
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-09-10 15:25 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-09-10 16:26 UTC
```

**6. Added: Affected components**

```diff
+ API, Dashboard, US Ingestion - Custom Metrics (beta), US Ingestion - US Attachment Ingestion, US Ingestion - US Cron Monitoring, US Ingestion - US Error Ingestion, US Ingestion - US Profile Ingestion, US Ingestion - US Replay Ingestion, US Ingestion - US Size Analysis Ingestion, US Ingestion - US Snapshot Ingestion, US Ingestion - US Span Ingestion, US Ingestion - US Transaction Ingestion
```

**7. Added: Update** (identified) · 2026-09-10 15:25 UTC

```diff
+ During migration to new control silo region we started to observe increased number of 500 errors.  Migration procedure was rolled back.
```

**8. Added: Update** (monitoring) · 2026-09-10 16:07 UTC

```diff
+ Issue were identified and fixes were applied. We continue to monitor situation
```

**9. Added: Update** (resolved) · 2026-09-10 16:26 UTC

```diff
+ Issue fully resolved
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-09-10 15:25 UTC | Major incident: Sentry.io elevated number of 500 errors (this change) | outage |

All Sentry changes: [timeline](https://rewindex.com/company/sentry/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/i0f57ed83f81bab · Markdown: https://rewindex.com/change/i0f57ed83f81bab.md · JSON: https://rewindex.com/api/v1/changes/i0f57ed83f81bab · Generated 2026-10-18T02:31:41.761Z