Kafka producer and JPA Transaction - spring-kafka

Question

I'm trying to make a composite transaction with JPA and Kafka with Spring-Kafka.
I need to avoid the message commit if the JPA transaction is rollbacked (eg when a ContraintViolationException is raised) but the following code does not working (if a ContraintViolationException is raised, the message is committed to topic).
My Kafka Configuration:
#Bean(name="jpaKafkaTx")
public ChainedKafkaTransactionManager<Object, Object> chainedTm(KafkaTransactionManager<String, String> kafkaTx, JpaTransactionManager jpaTx) {
return new ChainedKafkaTransactionManager<>(jpaTx, kafkaTx);
}
...
#Bean
public ConcurrentKafkaListenerContainerFactory<?, ?> kafkaListenerContainerFactory(KafkaOperations<?, ?> template,
ConcurrentKafkaListenerContainerFactoryConfigurer configurer,
ConsumerFactory<Object, Object> kafkaConsumerFactory, ChainedKafkaTransactionManager<Object, Object> chainedTx) {
...
factory.getContainerProperties().setTransactionManager(chainedTx);
return factory;
}
My Service
#Transactional(transactionManager = "jpaKafkaTx", rollbackFor = Exception.class)
public void update(){
updateDb();
produce();
}
..
public void updateDb(){
.....
jpaRepository.save();
}
My KafkaProducer Service
public void produce(...){
...
kafkaTemplate.send(message).addCallback(callback);
if (callback.isError()) {
log.error("KO");
} else {
log.info("OK");
}
....
}
The Kafka isolation level is: read_committed.
Could you help me? Where I can found a complete example?

Answer 1

return new ChainedKafkaTransactionManager<>(jpaTx, kafkaTx);
With that configuration, the kafka transaction is committed first.
Reverse the TM order, or just inject the KTM into the container and use the #Transactional to manage just the JPA transaction.
Note that the ChainedKafkaTransactionManager is deprecated with no replacement - see the comment in its javadocs.