private Message handleUnsubscribeMessage(
      final ChannelFactory<?> channelFactory, CommandMessage message) {
    Channel channel = getChannel(channelFactory, (String) message.getClientId());
    if (channel == null) return handleUnknownClientMessage(message);

    AsyncMessage reply = null;

    ServiceAdapter adapter = adapterFactory.getServiceAdapter(message);

    reply = (AcknowledgeMessage) adapter.manage(channel, message);

    postManage(channel);

    if (!(reply instanceof ErrorMessage)) {
      // Remove subscription message in distributed data (clustering).
      try {
        DistributedData gdd = graniteConfig.getDistributedDataFactory().getInstance();
        if (gdd != null) {
          String subscriptionId =
              (String) message.getHeader(AsyncMessage.DESTINATION_CLIENT_ID_HEADER);
          log.debug(
              "Removing subscription message from channel info: %s - %s",
              channel.getId(), subscriptionId);
          gdd.removeSubcription(channel.getId(), subscriptionId);
        }
      } catch (Exception e) {
        log.error(
            e,
            "Could not remove subscription from distributed data: %s - %s",
            channel.getId(),
            message.getHeader(AsyncMessage.DESTINATION_CLIENT_ID_HEADER));
      }
    }

    reply.setDestination(message.getDestination());
    reply.setClientId(channel.getId());
    reply.getHeaders().putAll(message.getHeaders());

    return reply;
  }