Spring-kafka error handling with DeadLetterPublishingRecoverer - spring

Question

I am trying to implement error handling in Spring boot kafa. In my Kafka listener I am throwing a runtime exception as per below:
#KafkaListener(topics= "Kafka-springboot-example", groupId="group-employee-json")
public void consumeEmployeeJson(Employee employee) {
logger.info("Consumed Employee JSON: "+ employee);
if(null==employee.getEmployeeId()) {
throw new RuntimeException("failed");
//throw new ListenerExecutionFailedException("failed");
}
}
And I have configured error handling as per below:
#Configuration
#EnableKafka
public class KafkaConfiguration {
#Bean
public ConcurrentKafkaListenerContainerFactory<Object, Object> containerFactory(
ConcurrentKafkaListenerContainerFactoryConfigurer configurer,
ConsumerFactory<Object, Object> kafkaConsumerFactory,
KafkaTemplate<Object, Object> template){
ConcurrentKafkaListenerContainerFactory<Object, Object> factory= new ConcurrentKafkaListenerContainerFactory<>();
configurer.configure(factory, kafkaConsumerFactory);
factory.setErrorHandler(new SeekToCurrentErrorHandler(
new DeadLetterPublishingRecoverer(template)));
return factory;
}
}
And my listener for DLT is as per below:
#KafkaListener(topics= "Kafka-springboot-example.DLT", groupId="group-employee-json")
public void consumeEmployeeErrorJson(Employee employee) {
logger.info("Consumed Employee JSON frpm DLT topic: "+ employee);
}
But my message is not getting published to DLT topic.
Any idea what I am doing wrong?
Edited:
application.properties
server.port=8088
#kafka-producer-config
spring.kafka.producer.bootstrap-servers=localhost:9092
spring.kafka.producer.key-serializer=org.apache.kafka.common.serialization.StringSerializer
spring.kafka.producer.value-serializer=org.springframework.kafka.support.serializer.JsonSerializer
#Kafka consumer properties
spring.kafka.consumer.bootstrap-servers=localhost:9092
spring.kafka.consumer.group-id=group-employee-json
spring.kafka.consumer.key-deserializer=org.apache.kafka.common.serialization.StringDeserializer
spring.kafka.consumer.value-deserializer=org.springframework.kafka.support.serializer.JsonDeserializer
spring.kafka.consumer.properties.spring.json.trusted.packages=*

Answer 1

public ConcurrentKafkaListenerContainerFactory<Object, Object> containerFactory(
If you use a non-standard bean name for the container factory, you need to set it on the #KafkaListener in the containerFactory property.
The default bean name is kafkaListenerContainerFactory which is auto-configured by Boot. You need to either override that bean or configure the listener to point to your non-standard bean name.