Mysql Articles
2 articles about Mysql. Explore Spring Boot implementation, design, and operations across related topics.
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Causes and Fixes for HikariCP "Failed to validate connection" and "Connection is closed" in Spring Boot - How to Decide maxLifetime and keepaliveTime
Learn how to isolate HikariCP "Failed to validate connection" and "Connection is closed" errors by pool stage, how to derive maxLifetime and keepaliveTime from DB and network timeouts, and how to diagnose why the pool does not recover after a DB restart.
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How to Connect Spring Boot to MySQL - application.yml Configuration, JDBC URL Parameters, and Time Zone/Character Encoding Pitfalls
A step-by-step guide to connecting Spring Boot 3.x to MySQL 8, covering Docker Compose startup, application.yml configuration, and connectivity checks. Also covers recommended JDBC URL parameter values and how to fix the Public Key Retrieval error, date/time offsets, and utf8mb4 garbled characters.