How to implement guide with classloader when using java module system in spring boot 3
I've been working on this all day and Hey everyone, I'm running into an issue that's driving me crazy. I'm trying to configure I'm trying to figure out I tried several approaches but none seem to work... After trying multiple solutions online, I still can't figure this out. I'm working with a perplexing scenario when trying to utilize the Java Module System (JPMS) in my Spring Boot 3 application. After migrating from Spring Boot 2.5, I've structured my project into modules, but I'm working with a `java.lang.NoClassDefFoundError` for a class that I know is present in my module. The class in question is part of a utility library that I included as a module dependency. When I run the application, I see the following behavior in the logs: ``` Exception in thread "main" java.lang.NoClassDefFoundError: com/example/util/MyUtilityClass at com.example.Application.main(Application.java:10) ``` I've checked that the module is defined in my `module-info.java` file as follows: ```java module com.example { requires com.example.util; // other dependencies } ``` Additionally, in my `com.example.util` module, I have defined the package in the `module-info.java` like this: ```java module com.example.util { exports com.example.util; } ``` I have ensured that all modules are compiled correctly, and I am using JDK 17. However, when I try to run the application with the command: ``` java --module-path target/classes --module com.example/com.example.Application ``` I still encounter the same `NoClassDefFoundError`. I've tried adding the `--add-modules` flag, but it hasn't resolved the scenario. I've also checked the classpath and module path settings in my IDE, which seem correct. It's quite frustrating, and I'm unsure where the question lies. Is there a specific way to configure Spring Boot to properly recognize and load module dependencies, or could it be an scenario with how I'm packaging my JAR files? Any insights or troubleshooting tips would be greatly appreciated! I'm using Java 3.9 in this project. Is there a better approach? I'm developing on Windows 10 with Java. Has anyone dealt with something similar? Has anyone dealt with something similar? What are your experiences with this? This issue appeared after updating to Java latest. I'd really appreciate any guidance on this. For reference, this is a production microservice.