# crates.io: Major incident: Request timeouts/Slow responses

**Summary:** _summary pending_
## Part of an outage event

- [AWS us-east-1 outage, Dec 22, 2021: 40 vendors, 40 incidents](https://rewindex.com/events/2021-12-22-aws-us-east-1)
- This incident started in the same window without naming AWS (timing only, not evidence of a link). (timing only, posted −15 min vs the first vendor naming AWS)

```mermaid
flowchart LR
  root["AWS us-east-1<br/>own incident not archived"]:::inferred
  h1["Within an hour<br/>8 vendors, 6 blamed AWS<br/>Firebolt, Bitbucket, HubSpot, CircleCI +4"]:::blames
  root --> h1
  h4["1 to 4 hours later<br/>1 vendor<br/>Confluent"]:::names
  root --> h4
  me["crates.io (this incident)<br/>posted −15 min"]:::me
  root -.->|"same window"| me
```

_Detected automatically from incidents that started together and named the same provider; a link means one incident named another vendor, not a confirmed cause._

- Kind: Major incident · Label: major (vendor)
- Changed: 2021-12-22 12:27 UTC · Detected: 2026-10-19 17:33 UTC
- [Source: https://stspg.io/1w66lgprp5zb](https://stspg.io/1w66lgprp5zb)
- [Company: crates.io](https://rewindex.com/company/crates-io.md)
- Versions: before (none: first archived) → after incident\_version:706/r6qckdr6wtq1@66d109eb7bd3
- Change 1 of 1 for this incident

Incident page (full timeline): [Request timeouts/Slow responses](https://rewindex.com/company/crates-io/incidents/r6qckdr6wtq1.md)
## What changed

**1. Added: Title**

```diff
+ Request timeouts/Slow responses
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2021-12-22 12:27 UTC
```

**5. Added: Resolved time**

```diff
+ 2021-12-22 15:07 UTC
```

**6. Added: Affected components**

```diff
+ crates.io
```

**7. Added: Update** (investigating) · 2021-12-22 12:27 UTC

```diff
+ We are currently investigating an incident that causes slow responses and request timeouts on crates.io.
```

**8. Added: Update** (investigating) · 2021-12-22 12:37 UTC

```diff
+ We are continuing to investigate this issue.
```

**9. Added: Update** (monitoring) · 2021-12-22 13:02 UTC

```diff
+ An outage of one of our service providers impacts our primary database and one of our application dynos. Currently, write operations will fail (uploading new crates, ...) and downloads will not be counted. About 25% of all download requests hit the affected dyno and will fail with a timeout. Cargo itself should be mostly unaffected due to retries.
```

**10. Added: Update** (monitoring) · 2021-12-22 14:39 UTC

```diff
+ Our service provider is still working to restore full functionality, but unfortunately there is no ETA for full recovery at this time. We continue to monitor the situation.
```

**11. Added: Update** (resolved) · 2021-12-22 15:07 UTC

```diff
+ All of our affected infrastructure has recovered and full functionality has been restored. Some caches may require a bit of warming up, so some slow responses should still be expected.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2021-12-22 12:27 UTC | Major incident: Request timeouts/Slow responses (this change) | major |

All crates.io changes: [timeline](https://rewindex.com/company/crates-io/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/i8968a1eb84e128 · Markdown: https://rewindex.com/change/i8968a1eb84e128.md · JSON: https://rewindex.com/api/v1/changes/i8968a1eb84e128 · Generated 2026-10-20T00:48:43.338Z