org.springframework.messaging.MessageHandlingException：方法参数类型 [class java.lang.Integer] 缺少标头“kafka_receivedMessageKey”

Question

问题org.apache.kafka.common.KafkaException: Failed to construct kafka consumer中提到了我的集群配置、类详情和jar版本

我已经启动了 Zookeeper-server、Kafka-server 和 Kafka REST 服务器。接下来，我将在 tomcat 上部署名为 spring-kafka-webhook-service.war 的 spring-boot 战争文件。

当我通过 Kafka REST 代理客户端发布消息时，我收到以下错误，这可能表明 @KafkaListener 方法无法读取 ConsumerRecord 传入消息。任何意见都将受到高度赞赏。

我的 Kafka-Rest 属性当前配置如下：

confluent-3.3.0/etc/kafka-rest/kafka-rest.properties

id=kafka-rest-test-server
schema.registry.url=http://localhost:8081
zookeeper.connect=localhost:2181

在tomcat上部署war后的错误日志

2017-12-26 09:11:01.143 ERROR 20430 --- [ntainer#0-0-C-1] o.s.kafka.listener.LoggingErrorHandler   : Error while processing: ConsumerRecord(topic = inventory, partition = 0, offset = 3, CreateTime = 1514279460946, checksum = 1183108784, serialized key size = -1, serialized value size = 72, key = null, value = InventoryEvent [id=7798, eventType='inventory.transaction', qtyReq='5', qtyLevel='27'])

org.springframework.kafka.listener.ListenerExecutionFailedException: Listener method could not be invoked with the incoming message
Endpoint handler details:
Method [public void com.psl.kafka.spring.InventoryEventReceiver.listenWithHeaders(com.psl.kafka.spring.InventoryEvent,java.lang.String,java.lang.Integer,int,java.lang.String)]
Bean [com.psl.kafka.spring.InventoryEventReceiver@798267fb]; nested exception is org.springframework.messaging.MessageHandlingException: Missing header 'kafka_receivedMessageKey' for method parameter type [class java.lang.Integer], failedMessage=GenericMessage [payload=InventoryEvent [id=7798, eventType='inventory.transaction', qtyReq='5', qtyLevel='27'], headers={kafka_offset=3, kafka_receivedMessageKey=null, kafka_receivedPartitionId=0, kafka_receivedTopic=inventory}]
        at org.springframework.kafka.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:183) ~[spring-kafka-1.1.7.RELEASE.jar:na]
        at org.springframework.kafka.listener.adapter.RecordMessagingMessageListenerAdapter.onMessage(RecordMessagingMessageListenerAdapter.java:72) ~[spring-kafka-1.1.7.RELEASE.jar:na]
        at org.springframework.kafka.listener.adapter.RecordMessagingMessageListenerAdapter.onMessage(RecordMessagingMessageListenerAdapter.java:47) ~[spring-kafka-1.1.7.RELEASE.jar:na]
        at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeRecordListener(KafkaMessageListenerContainer.java:792) [spring-kafka-1.1.7.RELEASE.jar:na]
        at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeListener(KafkaMessageListenerContainer.java:736) [spring-kafka-1.1.7.RELEASE.jar:na]
        at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.run(KafkaMessageListenerContainer.java:568) [spring-kafka-1.1.7.RELEASE.jar:na]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [na:1.8.0_151]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) [na:1.8.0_151]
        at java.lang.Thread.run(Thread.java:748) [na:1.8.0_151]
Caused by: org.springframework.messaging.MessageHandlingException: Missing header 'kafka_receivedMessageKey' for method parameter type [class java.lang.Integer]
        at org.springframework.messaging.handler.annotation.support.HeaderMethodArgumentResolver.handleMissingValue(HeaderMethodArgumentResolver.java:100) ~[spring-messaging-4.3.13.RELEASE.jar:4.3.13.RELEASE]
        at org.springframework.messaging.handler.annotation.support.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:103) ~[spring-messaging-4.3.13.RELEASE.jar:4.3.13.RELEASE]
        at org.springframework.messaging.handler.invocation.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:112) ~[spring-messaging-4.3.13.RELEASE.jar:4.3.13.RELEASE]
        at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:135) ~[spring-messaging-4.3.13.RELEASE.jar:4.3.13.RELEASE]
        at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:107) ~[spring-messaging-4.3.13.RELEASE.jar:4.3.13.RELEASE]
        at org.springframework.kafka.listener.adapter.HandlerAdapter.invoke(HandlerAdapter.java:48) ~[spring-kafka-1.1.7.RELEASE.jar:na]
        at org.springframework.kafka.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:174) ~[spring-kafka-1.1.7.RELEASE.jar:na]
        ... 8 common frames omitted

Answer 1

使用了@KafkaListener，使用了一个只有POJO“InventoryEvent”作为参数的方法

InventoryEvent event

而不是

@Payload InventoryEvent event,
@Header(KafkaHeaders.RECEIVED_TOPIC) String topic,
@Header(KafkaHeaders.RECEIVED_MESSAGE_KEY) Integer key,
@Header(KafkaHeaders.RECEIVED_PARTITION_ID) int partition,
@Header(KafkaHeaders.OFFSET) String offset

这解决了这个问题，因为 kafka_receivedMessageKey 永远不会按照 Artem Bilan https://stackoverflow.com/a/32125453/786676 的这个 SO 答案中的指定通过 Kafka 发送