我有一个spring- boot应用程序,它侦听Kafka流并将记录发送到某些服务以进行进一步处理。该服务有时可能会失败。注释中提到了异常情况。到目前为止,我自己模拟了服务成功和异常情况。
侦听器代码:
@Autowired PlanitService service @KafkaListener( topics = "${app.topic}", groupId = "notifGrp", containerFactory = "storeKafkaListener") public void processStoreNotify(StoreNotify store) throws RefrigAlarmNotifyException{ service.planitStoreNotification(store); // Some other logic which throws custom exception // RefrigAlarmNotifyException } }
消费者工厂配置如下:
@Bean public ConsumerFactory<String, StoreNotify> storeConsumerFactory() { Map<String, Object> config = new HashMap<>(); config.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, kafkaProperties.getConsumerBootstrapServers()); config.put(ConsumerConfig.GROUP_ID_CONFIG, "notifGrp"); config.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class); config.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, JsonDeserializer.class); config.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "latest"); try (ErrorHandlingDeserializer2<String> headerErrorHandlingDeserializer = new ErrorHandlingDeserializer2<>( new StringDeserializer()); ErrorHandlingDeserializer2<StoreNotify> errorHandlingDeserializer = new ErrorHandlingDeserializer2<>( new JsonDeserializer<>(StoreNotify.class, objectMapper()))) { return new DefaultKafkaConsumerFactory<>(config, headerErrorHandlingDeserializer, errorHandlingDeserializer); } } @Bean public ConcurrentKafkaListenerContainerFactory<String, StoreNotify> storeKafkaListener() { ConcurrentKafkaListenerContainerFactory<String, StoreNotify> factory = new ConcurrentKafkaListenerContainerFactory<>(); factory.setConsumerFactory(storeConsumerFactory()); factory.getContainerProperties().setAckOnError(false); factory.getContainerProperties().setAckMode(AckMode.RECORD); //factory.setMessageConverter(new ByteArrayJsonMessageConverter()); DeadLetterPublishingRecoverer recoverer = new DeadLetterPublishingRecoverer(kafkaTemplate, (r, e) -> { LOGGER.error("Exception is of type: ", e); if (e instanceof RestClientException) { LOGGER.error("RestClientException while processing {} ", r.value(), e); return new TopicPartition(storeDeadLtrTopic, r.partition()); } else { LOGGER.error("Generic exception while processing {} ", r.value(), e); return new TopicPartition(storeErrorTopic, r.partition()); } }); factory.setErrorHandler(new SeekToCurrentErrorHandler(recoverer, new FixedBackOff(0L, 0L))); return factory; }
当REST服务抛出RestClientException时,它应该进入上述 if 块。关于 FixedBackOff ,我不希望SeekToCurrentErrorHandler进行重试处理,因此我将第二个参数传递为0l。我只希望它发送具有指定主题的记录。如果我写错了,请纠正我。异常堆栈跟踪为
org.springframework.kafka.listener.ListenerExecutionFailedException: Listener method 'public void com.demo.ran.consumer.StoreKafkaConsumer.processStoreNotifMessage(com.demo.ran.model.StoreNotify) throws com.demo.ran.exception.RefrigAlarmNotifyException' threw exception; nested exception is org.springframework.web.client.RestClientException: Service exception; nested exception is org.springframework.web.client.RestClientException: Service exception at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.decorateException(KafkaMessageListenerContainer.java:1742) ~[spring-kafka-2.3.5.RELEASE.jar:2.3.5.RELEASE] at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeErrorHandler(KafkaMessageListenerContainer.java:1730) ~[spring-kafka-2.3.5.RELEASE.jar:2.3.5.RELEASE] at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeRecordListener(KafkaMessageListenerContainer.java:1647) ~[spring-kafka-2.3.5.RELEASE.jar:2.3.5.RELEASE] at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeWithRecords(KafkaMessageListenerContainer.java:1577) ~[spring-kafka-2.3.5.RELEASE.jar:2.3.5.RELEASE] at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeRecordListener(KafkaMessageListenerContainer.java:1485) ~[spring-kafka-2.3.5.RELEASE.jar:2.3.5.RELEASE] at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeListener(KafkaMessageListenerContainer.java:1235) ~[spring-kafka-2.3.5.RELEASE.jar:2.3.5.RELEASE] at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.pollAndInvoke(KafkaMessageListenerContainer.java:985) ~[spring-kafka-2.3.5.RELEASE.jar:2.3.5.RELEASE] at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.run(KafkaMessageListenerContainer.java:905) ~[spring-kafka-2.3.5.RELEASE.jar:2.3.5.RELEASE] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[na:1.8.0_241] at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_241] at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_241] Caused by: org.springframework.web.client.RestClientException: Service exception at com.demo.ran.service.PlanitService.planitStoreNotification(PlanitService.java:53) ~[classes/:na] at com.demo.ran.consumer.StoreKafkaConsumer.processStoreNotifMessage(StoreKafkaConsumer.java:48) ~[classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_241] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_241] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_241] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_241] at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:171) ~[spring-messaging-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.messaging.handler.invocation.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:120) ~[spring-messaging-5.2.3.RELEASE.jar:5.2.3.RELEASE] at org.springframework.kafka.listener.adapter.HandlerAdapter.invoke(HandlerAdapter.java:48) ~[spring-kafka-2.3.5.RELEASE.jar:2.3.5.RELEASE] at org.springframework.kafka.listener.adapter.MessagingMessageListenerAdapter.invokeHandler(MessagingMessageListenerAdapter.java:326) ~[spring-kafka-2.3.5.RELEASE.jar:2.3.5.RELEASE] at org.springframework.kafka.listener.adapter.RecordMessagingMessageListenerAdapter.onMessage(RecordMessagingMessageListenerAdapter.java:86) ~[spring-kafka-2.3.5.RELEASE.jar:2.3.5.RELEASE] at org.springframework.kafka.listener.adapter.RecordMessagingMessageListenerAdapter.onMessage(RecordMessagingMessageListenerAdapter.java:51) ~[spring-kafka-2.3.5.RELEASE.jar:2.3.5.RELEASE] at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeOnMessage(KafkaMessageListenerContainer.java:1696) ~[spring-kafka-2.3.5.RELEASE.jar:2.3.5.RELEASE] at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.invokeOnMessage(KafkaMessageListenerContainer.java:1679) ~[spring-kafka-2.3.5.RELEASE.jar:2.3.5.RELEASE] at org.springframework.kafka.listener.KafkaMessageListenerContainer$ListenerConsumer.doInvokeRecordListener(KafkaMessageListenerContainer.java:1634) ~[spring-kafka-2.3.5.RELEASE.jar:2.3.5.RELEASE] ... 8 common frames omitted
在此用例中,您无需使用手动工具。只需配置a SeekToCurrentErrorHandler并将异常抛出到容器;它将丢弃未处理的记录,执行查找并重新传递失败的消息。
SeekToCurrentErrorHandler
请参阅文档。
您可以使用来配置错误处理程序,DeadLetterPublishingRecoverer该程序可用于在重试一些次数后将记录发送到一个死信主题。
DeadLetterPublishingRecoverer
您可以配置可重试的异常。
} catch (Exception exception) { LOGGER.error("Exception while calling the service ", exception); // Ignore the record }
您不能像这样“吃掉”异常,让它传播到容器中。
使用MANUAL Acknowledgmentack时,必须添加作为参数并确认。
Acknowledgment