# Pipedream: Major incident: Timer-based triggers not running

**Summary:** Timer-based triggers, including Scheduler and scheduled app triggers, stopped around 21:30 UTC, affecting v1 workflows but not v2. Pipedream classified the outage as major, logged its start at 2023-11-03 21:49 UTC, and resolved it at 2023-11-03 22:00 UTC (computed duration: 10 min) after reverting code that introduced the bug. _(machine-written, sol)_
- Kind: Major incident · Label: outage (model (Jev))
- Changed: 2023-11-03 21:49 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://stspg.io/bhnhh6k2jr30](https://stspg.io/bhnhh6k2jr30)
- [Company: Pipedream](https://rewindex.com/company/pipedream.md)
- Versions: before (none: first archived) → after incident\_version:61/tprcmkchmz1x@e8e425dd187d
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Timer-based triggers not running
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2023-11-03 21:49 UTC
```

**5. Added: Resolved time**

```diff
+ 2023-11-03 22:00 UTC
```

**6. Added: Affected components**

```diff
+ Backend - Event Sources - Timer, Backend - Workflows - Timer, Event Sources - Timer, Workflows - Timer
```

**7. Added: Update** (investigating) · 2023-11-03 21:49 UTC

```diff
+ Timer-based triggers — like the Scheduler trigger, and other app-based triggers that run on a schedule — stopped running around 21:30 UTC. Our team is investigating and will post updates here.
```

**8. Added: Update** (identified) · 2023-11-03 21:52 UTC

```diff
+ We've reverted the code that introduced the bug. This also only affects v1 workflow triggers, not those using v2 (the latest version of workflows).
```

**9. Added: Update** (resolved) · 2023-11-03 22:00 UTC

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

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2023-11-03 21:49 UTC | Major incident: Timer-based triggers not running (this change) | outage |

All Pipedream changes: [timeline](https://rewindex.com/company/pipedream/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/icb2a3c77139d3a · Markdown: https://rewindex.com/change/icb2a3c77139d3a.md · JSON: https://rewindex.com/api/v1/changes/icb2a3c77139d3a · Generated 2026-10-18T03:28:51.929Z