# Firebolt: Critical incident: Accessing Firebolt web application may fail

**Summary:** Firebolt reported a critical web application outage starting 2021-12-07 10:57 UTC, resolved at 2021-12-07 11:00 UTC (3 min). DNS configuration changes could prevent UI access; running workloads and engine operations were unaffected. Firebolt announced a fix rollout and advised users with lingering issues to clear their local DNS cache. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2021-12-07 10:57 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/s5qrffmgjsx6](https://stspg.io/s5qrffmgjsx6)
- [Company: Firebolt](https://rewindex.com/company/firebolt.md)
- Versions: before (none: first archived) → after incident\_version:147/ysx56nlx7pbp@4752c7dbc6ae
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Accessing Firebolt web application may fail
```

**2. Added: Impact**

```diff
+ critical
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2021-12-07 10:57 UTC
```

**5. Added: Resolved time**

```diff
+ 2021-12-07 11:00 UTC
```

**6. Added: Affected components**

```diff
+ Firebolt Components - Web Application, Web Application
```

**7. Added: Update** (monitoring) · 2021-12-07 10:57 UTC

```diff
+ Due to some DNS configuration changes between 12:21 - 12:45 (Israel time) accessing Firebolt's UI could fail. The issue has been identified and a fix is being rolled out to the field. All running workloads and engine operations are not affected.
```

**8. Added: Update** (resolved) · 2021-12-07 11:00 UTC

```diff
+ The incident has been resolved. Users still experiencing issues should clear their local DNS cache.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2021-12-07 10:57 UTC | Critical incident: Accessing Firebolt web application may fail (this change) | outage |

All Firebolt changes: [timeline](https://rewindex.com/company/firebolt/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/id9a2c18d5431d8 · Markdown: https://rewindex.com/change/id9a2c18d5431d8.md · JSON: https://rewindex.com/api/v1/changes/id9a2c18d5431d8 · Generated 2026-10-18T02:55:35.494Z