How to resolve Spring Boot not scanning submodules issue?

If your Spring Boot application is unable to scan for submodules, you can try the following troubleshooting steps:

1. Make sure that your submodules have been properly configured with relevant Spring Boot annotations such as @SpringBootApplication, @ComponentScan, etc. These annotations will inform Spring Boot on which packages to scan.
2. Make sure that the package scanning path of your Spring Boot main application class includes the package path of any submodules. For example, if the package name of a submodule is com.example.submodule, your main application class’s package scanning path should include com.example.submodule, for instance through @ComponentScan(“com.example”).
3. Check if your submodules have been correctly added as dependencies to the main application. You can check in the pom.xml file of the main application to see if there are dependencies for the submodules. If not, add them manually.
4. Check if your submodules have been correctly configured with Maven or Gradle build files. Make sure that the build configuration files of the submodules include the correct dependencies and plugin configurations.
5. Check if your submodules have been correctly packaged as executable jar files. You can try running the command “mvn clean package” or “gradle build” in the root directory of your submodules to build them.

If you have tried the above solutions and still cannot resolve the issue, it is recommended to check the log files or error messages for more information on why the submodule was not scanned.