# Bitrise: Major incident: Long waiting times on M4 Pro machine (queue) builds

**Summary:** Bitrise reported a major Builds (CI) degradation affecting M4 Pro build queues from 2025-11-18 17:20 UTC to 2025-11-18 20:38 UTC, lasting 3 h 18 min. Bitrise attributed longer build-start waits to increased build volume following an earlier Cloudflare outage; execution remained normal. The incident was resolved with waits around 30 seconds across most queues. _(machine-written, sol)_
- Kind: Major incident · Label: degradation (model (Jev))
- Changed: 2025-11-18 17:20 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/287b7znj7npg](https://stspg.io/287b7znj7npg)
- [Company: Bitrise](https://rewindex.com/company/bitrise.md)
- Versions: before (none: first archived) → after incident\_version:177/0xyz9klk5nj1@615ce75c1ea5
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Long waiting times on M4 Pro machine (queue) builds
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2025-11-18 17:20 UTC
```

**5. Added: Resolved time**

```diff
+ 2025-11-18 20:38 UTC
```

**6. Added: Affected components**

```diff
+ ⚙️ Builds (CI)
```

**7. Added: Update** (identified) · 2025-11-18 17:20 UTC

```diff
+ <b>We identified the root cause of elevated build queues on M4 Pro. Some users may experience longer-than-usual wait times for builds to start, as queued jobs take longer to be picked up due to the Cloudflare outage experienced earlier today, which has resulted in a larger number of builds being run at this time.</b> <b>Services:</b> Build start times and queue wait times; build execution itself remains normal once a worker is allocated. <b>Scope:</b> M4 Pro Machines <b>Severity:</b> SEV-2 <b>What we’re doing?</b> Our Engineering teams identified the root cause and are now actively working on mitigations to restore stability across all affected services. We will perform validated mitigations as soon as they are determined safe. We will be adding more M4 Pro capacity by next week. <b>When will the next update be available?</b> You can expect a status update approximately <b>1 hour</b> from now.
```

**8. Added: Update** (identified) · 2025-11-18 18:18 UTC

```diff
+ We’re continuing to address the elevated build queue times, but wait times have now dropped to approximately 6-7 minutes across most queues. Our engineering team is monitoring the queues closely and is working on full remediation. We’ll keep you posted with further updates. Thank you for your patience.
```

**9. Added: Update** (resolved) · 2025-11-18 20:38 UTC

```diff
+ Wait times have now dropped to approximately 30 seconds across most queues. This incident has been resolved.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2025-11-18 17:20 UTC | Major incident: Long waiting times on M4 Pro machine (queue) builds (this change) | degradation |

All Bitrise changes: [timeline](https://rewindex.com/company/bitrise/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/i1a72db8af19eb9 · Markdown: https://rewindex.com/change/i1a72db8af19eb9.md · JSON: https://rewindex.com/api/v1/changes/i1a72db8af19eb9 · Generated 2026-10-18T02:29:15.126Z