Upstash outage, 5 May 2026
QStash US Region: Schedule Degradation
- Started
- Resolved
- 6 May 2026, 08:05 UTC (after 17 h 40 min)
- Impact
- Minor
- Affected
- US-EAST-1
Last update from Upstash
# **Incident Postmortem: Scheduled Jobs Inconsistency in US Region** On May 1, 2026, we experienced an incident affecting a subset of schedules in the US region following a recent infrastructure update. The issue has been resolved, and all affected schedules have been restored. ## **Summary** As part of an ongoing scalability improvement, we recently updated scheduling infrastructure in the US region to a new architecture. During this transition, a legacy execution path remained in the codebase as a fallback mechanism. On May 1, a bug caused the system to revert to the legacy path. This resulted in inconsistent state between the old and new scheduling systems for some users. ## **Impac...
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