# Mattermost: Major incident: Partial outage affecting a small number of workspaces

**Summary:** Mattermost reported a major partial outage affecting a small number of Cloud Workspaces, starting at 2022-09-21 15:08 UTC and resolved at 2022-09-21 16:38 UTC, lasting 1 h 29 min. Mattermost said it identified the root cause and mitigated the issue, but did not specify the cause or fix. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2022-09-21 15:08 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/syt67l68rm2t](https://stspg.io/syt67l68rm2t)
- [Company: Mattermost](https://rewindex.com/company/mattermost.md)
- Versions: before (none: first archived) → after incident\_version:106/2x92whh55njr@084617bbaf3f
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Partial outage affecting a small number of workspaces
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2022-09-21 15:08 UTC
```

**5. Added: Resolved time**

```diff
+ 2022-09-21 16:38 UTC
```

**6. Added: Affected components**

```diff
+ Cloud Workspaces
```

**7. Added: Update** (investigating) · 2022-09-21 15:08 UTC

```diff
+ We are currently investigating an issue that affect a minor number of workspaces.
```

**8. Added: Update** (investigating) · 2022-09-21 15:15 UTC

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

**9. Added: Update** (identified) · 2022-09-21 15:58 UTC

```diff
+ We have identified the root cause, and we are trying to mitigate the impact of the issue.
```

**10. Added: Update** (monitoring) · 2022-09-21 16:26 UTC

```diff
+ The issue has been fully mitigated for the moment, and we are monitoring the situation.
```

**11. Added: Update** (resolved) · 2022-09-21 16:38 UTC

```diff
+ The incident has been resolved, and we are monitoring our systems.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2022-09-21 15:08 UTC | Major incident: Partial outage affecting a small number of workspaces (this change) | outage |

All Mattermost changes: [timeline](https://rewindex.com/company/mattermost/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/i8db5771e83309e · Markdown: https://rewindex.com/change/i8db5771e83309e.md · JSON: https://rewindex.com/api/v1/changes/i8db5771e83309e · Generated 2026-10-18T03:55:38.952Z