卡夫卡消费者重试耗尽时如何设置确认

Question

我有一个重试 5 次的 Kafka 消费者，我正在使用 Spring Kafka with retry template 。现在，如果所有重试都失败了，那么在这种情况下如何确认工作。另外，如果我将确认模式设置为手动，那么如何确认这些消息

消费者

@Bean("kafkaListenerContainerFactory")
public ConcurrentKafkaListenerContainerFactory<String, String> kafkaListenerContainerFactory(RetryTemplate retryTemplate) {
    ConcurrentKafkaListenerContainerFactory<String, String> factory = new ConcurrentKafkaListenerContainerFactory<>();
    factory.setConsumerFactory(consumerFactory());
    factory.getContainerProperties().setAckMode(ContainerProperties.AckMode.MANUAL_IMMEDIATE);
    factory.setRetryTemplate(retryTemplate);
    factory.setRecoveryCallback(context -> {
        log.error("Maximum retry policy has been reached {}", context.getAttribute("record"));
        Acknowledgment ack = (Acknowledgment) context.getAttribute(RetryingMessageListenerAdapter.CONTEXT_ACKNOWLEDGMENT);
        ack.acknowledge();
        return null;
    });
    factory.setConcurrency(Integer.parseInt(kafkaConcurrency));
    return factory;
}

Kafka 监听器

@KafkaListener(topics = "${kafka.topic.json}", containerFactory = "kafkaListenerContainerFactory")
public void recieveSegmentService(String KafkaPayload, Acknowledgment acknowledgment) throws Exception {
    KafkaSegmentTrigger kafkaSegmentTrigger;
    kafkaSegmentTrigger = TransformUtil.fromJson(KafkaPayload, KafkaSegmentTrigger.class);
    log.info("Trigger recieved from segment service {}", kafkaSegmentTrigger);
    processMessage(kafkaSegmentTrigger);
    acknowledgment.acknowledge();
}

Answer 1

如果您有 RecoveryCallback 在重试耗尽时处理记录，并且您没有使用手动确认，则容器将提交偏移量。

如果您使用手动确认，您可以在恢复回调中提交偏移量。

传递给回调的上下文对象具有属性 RetryingMessageListenerAdapter.CONTEXT_ACKNOWLEDGMENT ('acknowledgment')。

还有CONTEXT_CONSUMER和CONTEXT_RECORD。

卡夫卡消费者重试耗尽时如何设置确认

How to set acknowledgement in case when retry gets exhausted in Kafka consumer

spring-retry

spring-boot

spring-kafka