Coder Life Journal

Jun 28, 2026 · Backend Development

Why You Should Limit Lombok Use: A Live Payment Incident Exposes Idempotency Risks

A midnight payment outage caused a user to be charged three times because a Lombok‑generated @Data class ignored the superclass requestId in its equals method, breaking idempotency checks; the article explains the root cause, reproduces the bug, and offers concrete guidelines for safe Lombok usage.