# Inngest: Major incident: Function processing delays

**Summary:** Inngest reported major function-processing delays starting 2026-07-23 14:17 UTC, resolved at 2026-07-23 15:24 UTC (1 h 6 min); delays began around 14:03 UTC. An issue publishing to a new Kafka topic delayed function scheduling; the team isolated the topic and scaled consuming services to clear the backlog. No events were dropped. _(machine-written, sol)_
- Kind: Major incident · Label: degradation (model (Jev))
- Changed: 2026-07-23 14:17 UTC · Detected: 2026-10-17 18:22 UTC
- [Source: https://status.inngest.com/incidents/01KY7NDTMKK4K6C45Y9K1Z54G3](https://status.inngest.com/incidents/01KY7NDTMKK4K6C45Y9K1Z54G3)
- [Company: Inngest](https://rewindex.com/company/inngest.md)
- Versions: before (none: first archived) → after incident\_version:193/01KY7NDTMKK4K6C45Y9K1Z54G3@a477b1ec3d80
- Change 1 of 1 for this incident

## What changed

**1. Added: Title**

```diff
+ Function processing delays
```

**2. Added: Impact**

```diff
+ major
```

**3. Added: Status**

```diff
+ resolved
```

**4. Added: Start time**

```diff
+ 2026-07-23 14:17 UTC
```

**5. Added: Resolved time**

```diff
+ 2026-07-23 15:24 UTC
```

**6. Added: Update** (investigating) · 2026-07-23 14:17 UTC

```diff
+ We are actively investigating an issue with function execution that is leading to delays starting function runs after events are received. We will provider further updates as we identify the cause and resolve the issue.
```

**7. Added: Update** (identified) · 2026-07-23 14:41 UTC

```diff
+ We have identified the cause of the issue - the team has deployed a fix and is scaling to catch up on function delays.
```

**8. Added: Update** (monitoring) · 2026-07-23 15:06 UTC

```diff
+ New function execution has resumed and nearly caught up from the incurred backlog. Wait for event and cancel on handlers are still in a backlog and are catching up with processing. No events were dropped during this issue, all functions will be executed, but with delays. The root cause has been confirmd and changes are underway to prevent reoccurrence.
```

**9. Added: Update** (resolved) · 2026-07-23 15:24 UTC

```diff
+ The incident is now resolved and the system is full operational. Delays began around 14:03 UTC caused by an issue publishing to a new Kafka topic. Recovery began around 14:40 UTC as the team was able to isolate this topic. The consuming services which schedules new function runs was scaled out and began to consume the backlog. No events were dropped during this incident, all functions were scheduled, but with delays during this time window. No action is needed for manual recovery.
```

## History of this incident

| When (UTC) | Change | Label |
| --- | --- | --- |
| 2026-07-23 14:17 UTC | Major incident: Function processing delays (this change) | degradation |

All Inngest changes: [timeline](https://rewindex.com/company/inngest/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/ie9d83cf4b8d894 · Markdown: https://rewindex.com/change/ie9d83cf4b8d894.md · JSON: https://rewindex.com/api/v1/changes/ie9d83cf4b8d894 · Generated 2026-10-18T02:29:24.069Z