docs: @Override
      public List<String> getConf(String groupName) {
  
          ZookeeperMgr zooKeeperMgr = ZookeeperMgr.getInstance();
          ZooKeeper zooKeeper = zooKeeperMgr.getZk();
  
          List<String> retList = new ArrayList<String>();
          try {
              getConf(zooKeeper, groupName, groupName, retList);
          } catch (KeeperException e) {
              LOG.error(e.getMessage(), e);
          } catch (InterruptedException e) {
              LOG.error(e.getMessage(), e);
          }
          return retList;
      }