Spring boot kafka set ackOnError in application.properties

Sviatlana :

Is there a way to set property ackOnError=false using spring boot application.properties file like other listener properties such as:

spring.kafka.listener.ack-mode
spring.kafka.listener.ack-count
spring.kafka.listener.ack-time
spring.kafka.listener.poll-timeout

?

If it is not possible, how cat I combine: properties from file + java config? I don't want to set all kafka properties in java-config like this:

 @Bean
    public Map<String, Object> consumerConfigs() {
        Map<String, Object> props = new HashMap<>();
        ......
        props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
        props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, JsonDeserializer.class);
        return props;
    }

I just want to override property ackOnError. Thank you in advance.

Gary Russell :

It's not available as a property but you can override Boot's container factory @Bean as follows...

@Bean
ConcurrentKafkaListenerContainerFactory<?, ?> kafkaListenerContainerFactory(
        ConcurrentKafkaListenerContainerFactoryConfigurer configurer,
        ConsumerFactory<Object, Object> kafkaConsumerFactory) {

    ConcurrentKafkaListenerContainerFactory<Object, Object> factory = new ConcurrentKafkaListenerContainerFactory<>();
    configurer.configure(factory, kafkaConsumerFactory);
    factory.getContainerProperties().setAckOnError(false);
    return factory;
}

This will apply all the other boot properties as well.

However, this setting doesn't have much utility unless you also stop the container (e.g. with a ContainerStoppingErrorHandler).

This is because the next successful record will have its offset committed anyway, which is beyond the offset of the failed record.

That said, in 2.3, it will be false by default.