16 DevOps Capstone Project Fix Maven Build Error Install Java 21 Rebuild Spring Boot Microservice
16 DevOps Capstone Project Fix Maven Build Error Install Java 21 Rebuild Spring Boot Microservice
In this video, we continue from where we left off in Part 15, where the Maven build failed due to a Java version mismatch (Java 11 vs Java 21). This hands-on tutorial demonstrates how to uninstall older Java and Maven versions, install Java 21 and Maven correctly, and finally rebuild the Spring Boot microservice successfully using the mvn clean package command.
This is a critical DevOps step that mirrors real-world challenges when managing build servers, Java dependencies, and version compatibility in CI/CD environments.
🕒 Timestamps
00:00 – 00:40 ➤ Discussion About the Issue in Previous Video
00:41 – 02:16 ➤ Uninstall Maven and Java 11
02:17 – 05:08 ➤ Install Java 21 and Maven
05:09 – 07:58 ➤ Run mvn package Command on Customer-Care Microservice – It Works! 🎉
⚙️ What You’ll Learn
How to analyze and fix Java version-related build errors in DevOps projects
Steps to remove older versions of Java and Maven from a Linux build server
How to install Java 21 and configure environment variables
Installing the latest version of Apache Maven on your DevOps build server
Successfully running the Maven build command to package a Spring Boot microservice
Best practices for managing Java environments in CI/CD pipelines
💡 Key Takeaways
By the end of this video, you’ll be able to:
✅ Troubleshoot Maven build failures due to Java version conflicts
✅ Upgrade your Java Development Kit (JDK) in a Linux environment
✅ Reinstall Maven and configure it properly
✅ Validate successful builds for your Spring Boot microservices
✅ Prepare the build server for future CI/CD automation with Jenkins, Docker, and Kubernetes
🧰 Technologies & Tools Used
Linux Build Server (Ubuntu)
Java 11 & Java 21 (JDK)
Apache Maven
Spring Boot Microservice (Customer-Care)
MobaXterm (SSH Client to Connect to Build Server)
🧠 Why This is Important
In real-world DevOps environments, teams often face build failures due to incompatible Java or Maven versions. Understanding how to fix these issues ensures smoother builds and reliable deployments.
This video will help you learn how to manage Java upgrades, maintain Maven configurations, and prepare your build pipeline for continuous integration and deployment (CI/CD).
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