in containers-marathon/src/main/java/org/apache/aries/containers/marathon/impl/MarathonServiceManager.java [167:173]
private Service createServiceFromExistingApp(List<App> apps, ServiceConfig config) {
if (apps.size() != 1)
throw new IllegalStateException("More than one existing app found for service " +
config.getServiceName() + " " + apps);
return createServiceFromApp(apps.get(0), config);
}