Sanyou's Java Diary

Nov 24, 2022 · Backend Development

Why Does Redis Increment Return Null Inside @Transactional? The Hidden Interaction Explained

This article investigates a production issue where Redis increment operations return null each morning, explores hypotheses about Redis pipelines, transactions, and Spring @Transactional interaction, reproduces the bug, analyzes the source code, and proposes two practical solutions to prevent null returns.