code: @Override
      public int compare(T server1, T server2) {
          LoadBalancerStats lbStats = getLoadBalancerStats();
          ServerStats stats1 = lbStats.getSingleServerStat(server1);
          ServerStats stats2 = lbStats.getSingleServerStat(server2);
          int failuresDiff = (int) (stats2.getFailureCount() - stats1.getFailureCount());
          if (failuresDiff != 0) {
              return failuresDiff;
          } else {
              return (stats2.getActiveRequestsCount() - stats1.getActiveRequestsCount());
          }
      }
docs: Function to sort the list by server health condition, with
  unhealthy servers before healthy servers. The servers are first sorted by
  failures count, and then concurrent connection count.