# Zilliz: Major incident: Service disruption

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

- [AWS us-east-1 outage, Oct 20, 2025: 141 vendors, 181 incidents](https://rewindex.com/events/2025-10-20-aws-us-east-1)
- This incident blames AWS as the cause. (hop 1, posted +1 h 44 min vs AWS’s own post)
- Evidence: “…e fully recovered. Starting at approximately 07:31 UTC October 20, 2025, customers in the AWS us-east-1 region may experience failures in normal cluster operations as well as accessing their clusters.…”

```mermaid
flowchart LR
  root["AWS us-east-1<br/>posted 07:11 UTC"]:::root
  before["Posted before AWS did<br/>5 vendors, 4 blamed AWS<br/>Salesforce, Descope, Ashby +2"]:::blames
  root --> before
  h1["Within an hour<br/>18 vendors, 17 blamed AWS<br/>Asana, Firebolt, Monday.com +15"]:::blames
  root --> h1
  h4["1 to 4 hours later<br/>30 vendors, 29 blamed AWS<br/>SingleStore, Loops, Buildkite +27"]:::blames
  root --> h4
  later["Later<br/>45 vendors, 44 blamed AWS<br/>RudderStack, Airbyte, Unbounce +42"]:::blames
  root --> later
  p0["Twilio<br/>posted +15 min"]:::blames
  root --> p0
  k0["BigCommerce<br/>+2 h 46 min"]:::hop2
  p0 -->|"blamed Twilio"| k0
  p1["Webflow<br/>posted +4 h 37 min, did not name AWS"]:::timing
  root -.-> p1
  k1["Rootly<br/>+10 h 23 min"]:::hop2
  p1 -->|"blamed Webflow"| k1
  p2["Baseten<br/>posted +4 min"]:::blames
  root --> p2
  k2["Zed<br/>+26 h 20 min"]:::hop2
  p2 -->|"blamed Baseten"| k2
  me["Zilliz (this incident)<br/>posted +1 h 44 min"]:::me
  h4 --- 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: 2025-10-20 08:54 UTC · Detected: 2026-10-19 17:03 UTC
- [Source: https://stspg.io/nql48dx1r0n4](https://stspg.io/nql48dx1r0n4)
- [Company: Zilliz](https://rewindex.com/company/zilliz.md)
- Versions: before (none: first archived) → after incident\_version:688/v1jl0c57h2wg@0a6e12c3a127
- Change 1 of 1 for this incident

Incident page (full timeline): [Service disruption](https://rewindex.com/company/zilliz/incidents/v1jl0c57h2wg.md)
## What changed

**1. Added: Title**

```diff
+ Service disruption
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2025-10-20 08:54 UTC
```

**5. Added: Resolved time**

```diff
+ 2025-10-20 10:47 UTC
```

**6. Added: Affected components**

```diff
+ AWS - us-east-1, us-east-1 (Virginia)
```

**7. Added: Update** (identified) · 2025-10-20 08:54 UTC

```diff
+ Starting at approximately 07:31 UTC October 20, 2025, customers in the AWS us-east-1 region may experience failures in normal cluster operations as well as accessing their clusters. We have identified the issue as an outage in AWS services and are actively working with them to mitigate the problem. We will provide another update as soon as more information is available.
```

**8. Added: Update** (monitoring) · 2025-10-20 09:47 UTC

```diff
+ We are seeing recovery for affected instances in the region. We will continue to monitor the situation and provider further updates as necessary.
```

**9. Added: Update** (monitoring) · 2025-10-20 10:05 UTC

```diff
+ We are continuing to monitor for any further issues.
```

**10. Added: Update** (resolved) · 2025-10-20 10:47 UTC

```diff
+ Our systems have fully recovered.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2025-10-20 08:54 UTC | Major incident: Service disruption (this change) | major |

All Zilliz changes: [timeline](https://rewindex.com/company/zilliz/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/i19bf5b304ba352 · Markdown: https://rewindex.com/change/i19bf5b304ba352.md · JSON: https://rewindex.com/api/v1/changes/i19bf5b304ba352 · Generated 2026-10-19T21:43:51.167Z