private void getSuperUsers(String kafkaSuperUsers) { super_users = new ArrayList<>(); String[] superUsers = kafkaSuperUsers.split(";"); for (String superUser : superUsers) { if (!superUser.isEmpty()) { final String trimmedUser = superUser.trim(); super_users.add(KafkaPrincipal.fromString(trimmedUser)); LOG.debug("Adding " + trimmedUser + " to list of Kafka SuperUsers."); } } }