我正在创建一条这样的路线：

<routes xmlns="http://camel.apache.org/schema/spring">
   <route id="ESP_01.Handle_Movement">
      <from uri="mqtt:ESP_01.Handle_Movement?host=tcp://localhost:1883&amp;subscribeTopicName=ESP_01/Handle Movement&amp;version=3.1&amp;maxReadRate=0&amp;qualityOfService=AtLeastOnce" />
      <to uri="micrometer:timer:camel.proxy.mqtt.kafka.stream?action=start" />
      <to uri="log://camel.proxy?groupInterval=3&amp;level=INFO" />
      <to uri="kafka://ESP_01.Handle_Movement?brokers=localhost:9092" />
      <to uri="micrometer:timer:camel.proxy.mqtt.kafka.stream?action=stop" />
      <to uri="micrometer:timer:camel.proxy.cache?action=start" />
      <setHeader name="CamelCacheKey">
         <constant>Test ESP_01.Handle_Movement</constant>
      </setHeader>
      <setHeader name="CamelCacheOperation">
         <constant>Update</constant>
      </setHeader>
      <to uri="cache://Test ESP_01.Handle_Movement?maxElementsInMemory=10&amp;eternal=true" />
      <to uri="micrometer:timer:camel.proxy.cache?action=stop" />
   </route>
</routes>

我有

<setHeader name="CamelCacheKey">
         <constant>Test ESP_01.Handle_Movement</constant>
      </setHeader>
      <setHeader name="CamelCacheOperation">
         <constant>Update</constant>
      </setHeader>

但是，根据这个示例，我从title得到的错误消息是，缺少了required already existing name参数：

org.apache.camel.FailedToCreateRouteException: Failed to create route ESP_01.Handle_Movement at: >>> SetHeader[null, constant{Test ESP_01.Handle_Movement}] <<< in route: Route(ESP_01.Handle_Movement)[[From[mqtt:ESP_01.Handle_Movem... because of headerName must be specified