# Astronomer: Major incident: Intermittent task instances failures.

**Summary:** Astro Hosted experienced intermittent task instance failures with major impact from 2026-08-18 04:17 UTC to 2026-08-18 07:36 UTC, lasting 3 h 18 min. Astronomer identified an issue affecting an internal rollout related to the pre\_execute Airflow hook and resolved the incident after completing a fix rollout across all Astro deployments. _(machine-written, sol)_
- Kind: Major incident · Label: degradation (model (Jev))
- Changed: 2026-08-18 04:17 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://status.astronomer.io/incidents/01M09HD09CG69RBJWCQ2ZHM4BP](https://status.astronomer.io/incidents/01M09HD09CG69RBJWCQ2ZHM4BP)
- [Company: Astronomer](https://rewindex.com/company/astronomer.md)
- Versions: before (none: first archived) → after incident\_version:135/01M09HD09CG69RBJWCQ2ZHM4BP@0893534ef303
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Intermittent task instances failures.
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-08-18 04:17 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-08-18 07:36 UTC
```

**6. Added: Update** (investigating) · 2026-08-18 04:17 UTC

```diff
+ We have identified an issue affecting an internal rollout related to the pre_execute Airflow hook in Astro Hosted. We have identified a fix and are rolling it out across the fleet. We are monitoring the rollout and will provide further updates as it progresses.
```

**7. Added: Update** (monitoring) · 2026-08-18 04:18 UTC

```diff
+ Fix is being rolled out across all astro deployments.
```

**8. Added: Update** (resolved) · 2026-08-18 07:36 UTC

```diff
+ Rollout has been completed
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-08-18 04:17 UTC | Major incident: Intermittent task instances failures. (this change) | degradation |

All Astronomer changes: [timeline](https://rewindex.com/company/astronomer/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/ia30e360fb7c083 · Markdown: https://rewindex.com/change/ia30e360fb7c083.md · JSON: https://rewindex.com/api/v1/changes/ia30e360fb7c083 · Generated 2026-10-18T00:38:13.333Z