# Dagster: Critical incident: Dagster Cloud UI Unavailable

**Summary:** Dagster Cloud UI was unavailable in a critical-impact incident starting 2024-06-03 21:56 UTC and resolved at 2024-06-03 22:01 UTC, with a reported duration of 4 min. Dagster attributed the loss of UI access to a load balancer configuration change and rolled it back. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2024-06-03 21:56 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/7mj6mktzbzll](https://stspg.io/7mj6mktzbzll)
- [Company: Dagster](https://rewindex.com/company/dagster.md)
- Versions: before (none: first archived) → after incident\_version:141/r0b30jfm5g7g@e7cbabb0f093
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Dagster Cloud UI Unavailable
```

**2. Added: Impact**

```diff
+ critical
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2024-06-03 21:56 UTC
```

**5. Added: Resolved time**

```diff
+ 2024-06-03 22:01 UTC
```

**6. Added: Affected components**

```diff
+ Dagster Cloud UI
```

**7. Added: Update** (investigating) · 2024-06-03 21:56 UTC

```diff
+ A configuration change to our load balancer has resulted in the Dagster Cloud UI being temporarily unavailable. We are in the process of rolling back the configuration change now.
```

**8. Added: Update** (monitoring) · 2024-06-03 21:58 UTC

```diff
+ The configuration change has been rolled back and we are monitoring to ensure that access to the Dagster Cloud UI has been restored.
```

**9. Added: Update** (resolved) · 2024-06-03 22:01 UTC

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

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2024-06-03 21:56 UTC | Critical incident: Dagster Cloud UI Unavailable (this change) | outage |

All Dagster changes: [timeline](https://rewindex.com/company/dagster/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/i92935db855611b · Markdown: https://rewindex.com/change/i92935db855611b.md · JSON: https://rewindex.com/api/v1/changes/i92935db855611b · Generated 2026-10-18T02:31:45.280Z