Fixing 'Class is not accessible through the ClassLoader.' warning with Jenkins, SonarQube, and Gradle

Question

When SonarQube analyzes my Java project which is built using Gradle and Jenkins, I get a lot of warnings about third party libraries not being accessible through the ClassLo

Answer 1

The following fixed this issue for me in build.gradle

sonarqube {
    properties {
        def compileDependencies = project.configurations.compile.files.collect {it.path}join(",")
        def compileOnlyDependencies = project.configurations.compileOnly.files.collect {it.path}join(",")

        property "sonar.java.libraries", "$compileDependencies,$compileOnlyDependencies"
        property "sonar.test.libraries", "$compileDependencies,$compileOnlyDependencies"

    }
}

Answer 2

You'll have to set sonar.libraries. But in order to set this property manually, you'll have to define a Gradle task that copies all external dependencies to a lib directory, and then use sonar.libraries=path/to/lib/*.jar to reference them. Instead, I'd invoke Sonar via the sonar-runner Gradle plugin, which will take care of setting the above properties (plus sonar.libraries and others) for you.