fatal error compiling invalid flag --module-path

Question

I have a project. Originally it was a single module project with structure like this

java-cloud-sample\\
    src\\
        main\\
            java
    pom.xm         


        

Answer 1

This failure occurs when maven installed on your machine is configured with java8 as the default java version. You can confirm this by executing

mvn -version

on your terminal and checking the Java version stated in the configuration.

To resolve the version to a newer and supported version like java9 at the moment, you can create/edit the mavenrc(on MacOS) file on your machine:

vi ~/.mavenrc

to include these

export PATH
export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk-9.jdk/Contents/Home/
export PATH=${PATH}:$JAVA_HOME/bin

Once you save this configuration, you can confirm maven should be using Java version 9 using the same command and then your project shall build without the stated error.