As part of the supportability review for jlink JEP, I saw a few areas which we might be able to capture better context in the exceptions thrown.

jdk/tools/jlink/internal/
ImagePluginConfiguration.java:

        if (!Files.isDirectory(dirPath)) {
            throw new IllegalArgumentException("Not a directory");
        }

== print dirPath ?

TaskHelper.java:

                if (!Files.exists(path) || !Files.isDirectory(path)) {
                    throw newBadArgs("err.existing.image.must.exist");
                }
== print path ?

jdk/tools/jlink/plugin
ExecutableImage.java:
        if (!Files.exists(home)) {
            throw new IllegalArgumentException("Invalid image home");
        }
== print home ?