code: private String getInfoFormat(List<WorkerInfo> workerInfoList, boolean isShort) {
      int maxWorkerNameLength = workerInfoList.stream().map(w -> w.getAddress().getHost().length())
          .max(Comparator.comparing(Integer::intValue)).get();
      int firstIndent = 16;
      if (firstIndent <= maxWorkerNameLength) {
        // extend first indent according to the longest worker name by default 5
        firstIndent = maxWorkerNameLength + 5;
      }
      if (isShort) {
        return "%-" + firstIndent + "s %-16s %-13s %s";
      }
      return "%-" + firstIndent + "s %-16s %-13s %-16s %s";
    }
docs: Gets the info format according to the longest worker name.
  @param workerInfoList the worker info list to get info from
  @param isShort whether exists only one tier
  @return the info format for printing long/short worker info