docs: void resolveHostname(boolean synchronous) {
          Runnable r = new Runnable() {
              @Override
              public void run() {
                  String remoteHost = ReverseDNSCache.hostnameOrAddress(m_remoteSocketAddress.getAddress());
                  if (!remoteHost.equals(m_remoteSocketAddress.getAddress().getHostAddress())) {
                      m_remoteHostname = remoteHost;
                      m_remoteHostAndAddressAndPort = remoteHost + m_remoteHostAndAddressAndPort;
                      m_toString = VoltPort.this.toString() + ":" + m_remoteHostAndAddressAndPort;
                  }
              }
          };
          if (synchronous) {
              r.run();
          } else {
              /*
               * Start the reverse DNS lookup in background because it might be
               * very slow if the hostname is not specified in local /etc/hosts.
               */
              try {
                  ReverseDNSCache.submit(r);
              } catch (RejectedExecutionException e) {
                  networkLog.debug(
                          "Reverse DNS lookup for " + m_remoteSocketAddress + " rejected because the queue was full");
              }
          }
      }