PostgreSQL: 40P01 deadlock detected Process waiting for ExclusiveLock
error: deadlock detected (40P01) DETAIL: Process 18420 waits for ExclusiveLock on tuple (42,1); blocked by process 18421.
Immediate Remediation
bash
Ensure concurrent transactions update tables and rows in consistent deterministic order, or retry with exponential backoff on 40P01.
Root Cause Analysis
Encountered in PostgreSQL when standard configuration or runtime constraints are violated.
Verification & Guardrails
- Verify dependencies and runtime version compatibility.
- Ensure clean build artifact state.
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