Edge Functions: Several users reported 503 errors with SUPABASE_EDGE_RUNTIME_ERROR error code

Incident Report for Supabase

Resolved

Incident Summary
A health check designed to prevent Out-of-Memory (OOM) conditions began closing some incoming connections, which led to 503 errors for a subset of users. These errors were initially surfaced under a generic SUPABASE_EDGE_RUNTIME_ERROR code.

Timeline & Actions
Sunday, 26: Issue detected as user reports of 503 errors increased. Investigation into root cause began.
Monday, 27: Introduced a more accurate error code (SUPABASE_EDGE_RUNTIME_SERVICE_DEGRADED) and implemented infrastructure changes to mitigate impact.
Tuesday, 28: Adjusted conditions for returning 503 responses to be less aggressive. Prepared a “retry-on-degraded” mechanism (not yet deployed).

Current Status
Mitigations are in place and improvements to error handling are ongoing. Further resilience enhancements will be deployed shortly.

Posted Apr 24, 2026 - 10:00 UTC