# Segment: Major incident: Reverse ETL syncs experiencing partial disruptions

**Summary:** Certain Segment Reverse ETL syncs in the EU and US failed in a major-impact outage starting 2026-04-09 16:40 UTC and resolved at 2026-04-09 19:53 UTC, lasting 3 h 12 min. Segment reported implementing a fix, after which syncs proceeded successfully without failures. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2026-04-09 16:40 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/7rz6rl0w6hd7](https://stspg.io/7rz6rl0w6hd7)
- [Company: Segment](https://rewindex.com/company/segment.md)
- Versions: before (none: first archived) → after incident\_version:162/qv10t6r0hk6c@a8b7aad0948b
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Reverse ETL syncs experiencing partial disruptions
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-04-09 16:40 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-04-09 19:53 UTC
```

**6. Added: Affected components**

```diff
+ Reverse ETL (EU), Reverse ETL - Reverse ETL (EU), Reverse ETL - Reverse ETL (US), Reverse ETL (US)
```

**7. Added: Update** (investigating) · 2026-04-09 16:40 UTC

```diff
+ Certain Reverse ETL syncs are experiencing failures. The team is currently investigating the issue.
```

**8. Added: Update** (identified) · 2026-04-09 18:15 UTC

```diff
+ We've identified the issue and are currently working on mitigating it.
```

**9. Added: Update** (monitoring) · 2026-04-09 19:29 UTC

```diff
+ A fix has been implemented and Reverse ETL syncs are now proceeding successfully without any failures. We are closely monitoring the recovery process.
```

**10. Added: Update** (resolved) · 2026-04-09 19:53 UTC

```diff
+ This incident has been resolved.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-04-09 16:40 UTC | Major incident: Reverse ETL syncs experiencing partial disruptions (this change) | outage |

All Segment changes: [timeline](https://rewindex.com/company/segment/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._


---
Canonical: https://rewindex.com/change/i50ac3986d00193 · Markdown: https://rewindex.com/change/i50ac3986d00193.md · JSON: https://rewindex.com/api/v1/changes/i50ac3986d00193 · Generated 2026-10-18T05:15:59.049Z