凝视spring boot Kafka项目时出错

Question

消费者配置

@Bean
public Map<String, Object> consumerConfigs() {
    Map<String, Object> props = new HashMap<String, Object>();
    props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServer);
    props.put(ConsumerConfig.GROUP_ID_CONFIG, consumerGroup);
    props.put(ConsumerConfig.SESSION_TIMEOUT_MS_CONFIG, 30000);
    props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
    props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
    return props;
}

Kafka监听器容器厂

@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;
}

Answer 1

对于manual_immediateack模式（对于任何手动模式，基本上都是），必须关闭consumerconfig.enable_auto_commit_configconsumer属性。

这就是那个例外的原因。

我想您可以在应用程序.properties中不使用spring.kafka.consumer.enableAutoCommit。