Your Spring Boot app starts, H2 Console connects, but... where are the tables? Here's how to test if your H2 database is working and fix the most common issue: missing tables.
Your Spring Boot app won't start and you see a "database is locked" error. The culprit? Multiple instances of your application running simultaneously, all trying to access the same database file. Here's how to identify and fix this common problem.
Ever wondered what those spring.datasource.* and spring.jpa.* properties actually do when your Spring Boot app starts? Let's trace the complete journey from configuration file to running database, step by step.