# Jupyter (Anaconda): Major incident: Errors downloading repodata.json on conda.anaconda.org

**Summary:** A major incident affected conda commands near San Jose, California, including Github Actions runners, with repodata.json connection failures or 503 errors. It started 2025-12-01 21:58 UTC and was marked resolved (computed duration: 0 min), although the update reports impact through 2025-12-02 03:35 UTC. The vendor cited a connection spike at a single regional data center. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2025-12-01 21:58 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/dp4shkvg887b](https://stspg.io/dp4shkvg887b)
- [Company: Jupyter (Anaconda)](https://rewindex.com/company/jupyter-anaconda.md)
- Versions: before (none: first archived) → after incident\_version:150/8ntln142ckd8@e3c6b39ec551
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Errors downloading repodata.json on conda.anaconda.org
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2025-12-01 21:58 UTC
```

**5. Added: Resolved time**

```diff
+ 2025-12-01 21:58 UTC
```

**6. Added: Update** (resolved) · 2025-12-01 21:58 UTC

```diff
+ Between 2025-12-01 21:58 UTC and  2025-12-02 03:35 UTC, users running conda commands from servers located near San Jose, California (such as Github Actions runners) would see the message "CondaHTTPError: HTTP 000 CONNECTION FAILED for url <https://conda.anaconda.org/conda-forge/noarch/repodata.json>" or 503 errors. The issue was caused by a spike of connections to a single data center in that region, which overloaded its capacity. We are working with our networking vendor to implement a more permanent solution. We apologize for the disruption.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2025-12-01 21:58 UTC | Major incident: Errors downloading repodata.json on conda.anaconda.org (this change) | outage |

All Jupyter (Anaconda) changes: [timeline](https://rewindex.com/company/jupyter-anaconda/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/ic9b6ce2e7dc07d · Markdown: https://rewindex.com/change/ic9b6ce2e7dc07d.md · JSON: https://rewindex.com/api/v1/changes/ic9b6ce2e7dc07d · Generated 2026-10-18T02:28:11.058Z