Spring Boot Application Failed to Start (Port 8080 Already in Use) | Real Case Demo

Описание: 🧭 Spring Boot won’t start? Port 8080 already in use?
In this short demo, we show what happens when a Spring Boot application fails to launch due to a port conflict and how the issue manifests in the Eclipse IDE.

The video illustrates:
Running the app on port 8081
Switching to port 8080
Interpreting the "APPLICATION FAILED TO START" message
Observing browser and console behavior in real time

🔍 A full case analysis is available (in Polish) on the blog:
👉 https://programista1024.pl

There, you'll find a step-by-step diagnostic using PowerShell to identify the process blocking the port and understand how to avoid such conflicts in the future. Even if the article is in Polish, the steps are based on standard tools familiar to most developers.

📌 Tematy poruszane w materiale:
Spring Boot, port binding, debugging, console logs, Eclipse IDE, PowerShell, Java backend, development workflow

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