One-Jar is incomplete, i.e. it does not provide a URL handler for it's jar-in-jar resources.
You can use a "Fat-jar" Layout if you unpack all the jogamp jars and natives:
/com/lala1/Lala1.class
/com/lala2/Lala2.class
/natives/<os.and.arch>/libLala1.so
/natives/<os.and.arch>/libLala2.so
It is also possible to use the Eclipse extended "one-jar" implementation "Export -> Java.Runnable_JAR_file -> Library handling: Package required libraries into generated JAR" this classloader implementation do provide a URL handler for it's jar-in-jar resources.