我使用的是cppkafka库，librdkafka的 Package 器，而c++kafka客户机用于一个非常简单的消息流任务。我的consumer类行为异常，因为接收消息需要相当长的时间。更准确地说，每次运行并保持运行接收可执行文件时，使用者都可以正确地接收第一批消息，但随后的消息大约需要15秒才能到达。有人知道什么样的可能性会导致这样的事情（Kafka配置、特定于库的问题或我愚蠢的错误）？万分感谢。
我的接收线如下

configuration_.set("group.id", 0);
consumer_ = std::make_unique<cppkafka::Consumer>(configuration_);
consumer_->subscribe({TopicTraits<trade::OrderRequest>::topic, TopicTraits<trade::CancelRequest>::topic});
std::thread([this] {
  while (working_) {
    cppkafka::Message msg = consumer_->poll();
    if (msg) {
      if (msg.get_error()) {
        if (!msg.is_eof()) {
          ERROR("error occurred while polling message: {}", msg.get_error());
        }
      } else {
        try {
          Json j = Json::parse(msg.get_payload());
          if (msg.get_topic() == TopicTraits<trade::OrderRequest>::topic) {
            INFO("received [order_req], {}", msg.get_payload());
            ReceiveOrderRequest(j.get<trade::OrderRequest>());
          } else if (msg.get_topic() == TopicTraits<trade::CancelRequest>::topic) {
            INFO("received [cancel_req], {}", msg.get_payload());
            ReceiveCancelRequest(j.get<trade::CancelRequest>());
          }
        } catch (const std::exception &e) {
          ERROR("error occurred while handling incoming message, {}", e.what());
        }
      }
    }
  }
}).detach();