For the record:

The configurations default, gwtRuntime, modulesRuntime, runtime, setupRuntime are (implicitly) declared as transitive. All of them declare the dependency org.apache.solr:solr-core:4.3.0. This depends on org.restlet.jee:org.restlet:2.1.1 and org.apache.solr:solr-parent:4.3.0, and this last one in turn declares in its pom the "Public online Restlet repository" http://maven.restlet.org.

But Gradle doesn't honor repositories declared in POMs, so gradle -q dependencies warns about failing to fetch org.restlet.jee:org.restlet:2.1.1

I'm not sure how relevant all of this is, as it seems I still can compile and build a working webapp, but my IDE complains and throws and exception upon opening the project.

repositories {

    mavenLocal()

    if (project.hasProperty('additional_repositories')){

        additional_repositories.split(';').each{ repo ->

            maven { url repo }

        }

    }

    mavenCentral()

    // Workaround for org.netbeans.gradle.model.util.TransferableExceptionWrapper:

    // org.gradle.internal.resolve.ModuleVersionNotFoundException:

    // Could not find org.restlet.jee:org.restlet:2.1.1.

    maven {

        url "http://maven.restlet.org/"

    }

}