One of the most common issues developers encounter when using Spring Boot with JPA is: “Tables are not being created automatically by Hibernate.” You expect Hibernate to generate tables based on your entities —but nothing happens. In this production-grade guide, you will learn: This post is written for beginners, intermediate developers, and architects building real

One of the most common and frustrating errors when starting a Spring Boot application is: “Failed to configure a DataSource” This often happens when a Spring Boot app tries to connect to a database during startup, but cannot create a proper DataSource.In production systems and real projects, this error points to misconfiguration, missing dependencies, or

Upgrading Java can provide performance, security, and feature benefits.But in real Spring Boot projects, a Java version upgrade often leads to startup failures. This guide explains why Spring Boot applications fail to start after a Java upgrade, what exact errors you might encounter, and how to fix them — in development, CI/CD, and production environments.

One of the most common errors Spring Boot developers face is: Web server failed to start. Port 8080 was already in use This error usually appears when your Spring Boot application starts successfully, but the embedded web server (Tomcat/Jetty/Undertow) cannot bind to port 8080. In this guide, you’ll learn: This explanation works for Windows, macOS,

Your application starts successfully, the startup logs look clean, and there are no exceptions. But when you try to access an API endpoint, nothing happens—or you receive a 404, 403, or no response at all. This issue occurs not only during local development but also in production deployments and CI/CD environments. In this guide, you’ll