code: @Override
      public void markAsAlive(Node node, boolean isMaster, String restTransportAddress) {
          node.getFields().put("last_seen", Tools.getUTCTimestamp());
          node.getFields().put("is_master", isMaster);
          node.getFields().put("transport_address", restTransportAddress);
          try {
              save(node);
          } catch (ValidationException e) {
              throw new RuntimeException("Validation failed.", e);
          }
      }
docs: Mark this node as alive and probably update some settings that may have changed since last server boot.
  
  @param isMaster
  @param restTransportAddress