Upstash outage, 8 May 2026
QStash US Region Service Disruption
- Started
- Resolved
- 8 May 2026, 10:08 UTC (after 22 min)
- Impact
- Critical
- Affected
- US-EAST-1
Last update from Upstash
**Root Cause Analysis** On **April 24**, we deployed a more optimized scheduler implementation in the **US East \(N. Virginia\)** region. On **May 8**, a user who had active schedules deleted their account. Under normal behavior, scheduled tasks associated with a deleted account should wake up, detect that the account no longer exists, and exit after performing cleanup. Due to a bug introduced in the new scheduler implementation, this code path did not return early as intended. Execution continued and resulted in a nil pointer dereference. A second issue then amplified the impact. When a panic occurs in the scheduler, it is designed to be recovered, logged, and isolated so that the...
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