我现在陷入了一个手动管理kafka偏移量和提交的简单示例中。我有一个springcloudstreams应用程序 enable.auto.commit = false （在打印consumervalues时在启动日志中看到），但是当我解析消息时，它仍然不提供确认头。
这是我的听众：

@StreamListener(Sink.INPUT)
public void handleSchedulerMessage(@Payload SchedulerEvent event, @Header(KafkaHeaders.ACKNOWLEDGMENT) Acknowledgment acknowledgment) {
    log.debug("[message={}]", event);
    // todo: processing
    log.debug("Event processed successfully [event={}]", event);
}

配置的yaml也非常简单：

spring:
  application:
    name: scheduler
  cloud:
    stream:
      kafka:
        binder:
          brokers: *kafka-broker*:9092
          zkNodes: *zookeeper*:2181
      bindings:
        input:
          destination: scheduler
          contentType: application/json
          consumer:
            autoCommitOffset: false

当我发送信息时，会立即弹出一个错误：

2018-05-22 11:38:32.470 ERROR 11651 --- [container-0-C-1] o.s.integration.handler.LoggingHandler   : org.springframework.messaging.MessageHandlingException: Missing header 'kafka_acknowledgment' for method parameter type [interface org.springframework.kafka.support.Acknowledgment], failedMessage=GenericMessage [payload=byte[38], headers={kafka_offset=9, kafka_consumer=org.apache.kafka.clients.consumer.KafkaConsumer@fdac355, deliveryAttempt=3, kafka_timestampType=CREATE_TIME, kafka_receivedMessageKey=null, kafka_receivedPartitionId=0, kafka_receivedTopic=scheduler, kafka_receivedTimestamp=1526981909241, contentType=application/json}]

收到的消息不包含所需的标头，这与禁用autocommit时文档所述相反：

Whether to autocommit offsets when a message has been processed. If set to false, a header with the key kafka_acknowledgment of the type org.springframework.kafka.support.Acknowledgment header will be present in the inbound message. Applications may use this header for acknowledging messages.

代码并不复杂，我也没有使用任何预先生成的项目。举例说明不了我做了什么，所以我不知道我可能会错过什么。