# Astronomer: Incorrect scheduler heartbeat metrics being reported

- Impact (vendor’s label): major
- Status: resolved
- Started: 2026-08-18 18:51 UTC · Resolved: 2026-09-10 22:19 UTC · Duration: 23 d
- Updates: 3
- [Vendor status page: https://status.astronomer.io/incidents/01M0B3EMK58DTX2DW16S9RNHV5](https://status.astronomer.io/incidents/01M0B3EMK58DTX2DW16S9RNHV5)
- [Company: Astronomer](https://rewindex.com/company/astronomer.md)

## Summary

Astronomer reported a major degradation from 2026-08-18 18:51 UTC to 2026-09-10 22:19 UTC, lasting 23 days 3 h. A metrics reporting bug falsely flagged missed scheduler heartbeats, affecting Astro UI dashboard and monitoring visibility; task execution, scheduling, and workflow processing were unaffected. Astronomer reported rolling out a fix and later marked the issue resolved. _(machine-written, sol)_
## Timeline of updates

- **investigating** 2026-08-18 18:51 UTC: Our metrics pipeline is falsely displaying spikes in scheduler heartbeat metrics, despite underlying component health.
- **identified** 2026-09-08 18:31 UTC: We've identified the cause of the false availability alerts that have been showing the Astro UI. This is a degradation affecting dashboard and monitoring visibility only. Task execution, scheduling, and workflow processing have not been impacted. The issue is the result of a metrics reporting bug that has been intermittently flagging scheduler heartbeats as missed when they were not. We are actively rolling out a fix that corrects how these metrics are reported.
- **resolved** 2026-09-10 22:19 UTC: This issue is now resolved.

## Rewindex changes for this incident

- 2026-08-18 18:51 UTC: [Major incident: Incorrect scheduler heartbeat metrics being reported](https://rewindex.com/change/i7392cca36e15fa.md)


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Canonical: https://rewindex.com/company/astronomer/incidents/01M0B3EMK58DTX2DW16S9RNHV5 · Markdown: https://rewindex.com/company/astronomer/incidents/01M0B3EMK58DTX2DW16S9RNHV5.md · JSON: https://rewindex.com/api/v1/companies/astronomer/incidents/01M0B3EMK58DTX2DW16S9RNHV5 · Generated 2026-10-18T11:46:10.528Z