docs: public ChannelStatus status(Long channelId) {
          String path = StagePathUtils.getChannelByChannelId(channelId);
          byte[] data = null;
          try {
              data = zookeeper.readData(path);
          } catch (ZkNoNodeException e) {
              // 如果节点已经不存在，则不抛异常
              // ignore
              return null;
          } catch (ZkException e) {
              throw new ArbitrateException("Channel_status", channelId.toString(), e);
          }
  
          return JsonUtils.unmarshalFromByte(data, ChannelStatus.class);
      }