docs: public void init() {
          String rootPath = ManagePathUtils.getRoot();
          String channelRootPath = ManagePathUtils.getChannelRoot();
          String nodeRootPath = ManagePathUtils.getNodeRoot();
          try {
              zookeeper.create(rootPath, new byte[0], CreateMode.PERSISTENT);
              zookeeper.create(channelRootPath, new byte[0], CreateMode.PERSISTENT);
              zookeeper.create(nodeRootPath, new byte[0], CreateMode.PERSISTENT);
          } catch (ZkNodeExistsException e) {
              // 如果节点已经存在，则不抛异常
              // ignore
          } catch (ZkException e) {
              throw new ArbitrateException("system_init", e);
          }
      }