I'm trying to do some PoC on "exactly one delivery" concept with Apache Kafka using Spring Cloud Streams + Kafka Binding.
I installed Apache Kafka "kafka_2.11-1.0.0" and defined "transactionIdPrefix" in the producer, which I understand is the only thing I need to do to enable transactions in Spring Kafka, but when I do that and run simple Source & Sink bindings within the same application, I see some messages are received and printed in the consumer and some get an error.
For example, message #6 received:
[49] Received message [Payload String content=FromSource1 6][Headers={kafka_offset=1957, scst_nativeHeadersPresent=true, kafka_consumer=org.apache.kafka.clients.consumer.KafkaConsumer@6695c9a9, kafka_timestampType=CREATE_TIME, my-transaction-id=my-id-6, id=302cf3ef-a154-fd42-6b43-983778e275dc, kafka_receivedPartitionId=0, contentType=application/json, kafka_receivedTopic=test10, kafka_receivedTimestamp=1514384106395, timestamp=1514384106419}]
but message #7 had an error "Invalid transition attempted from state IN_TRANSACTION to state IN_TRANSACTION":
2017-12-27 16:15:07.405 ERROR 7731 --- [ask-scheduler-4] o.s.integration.handler.LoggingHandler : org.springframework.messaging.MessageHandlingException: error occurred in message handler [org.springframework.cloud.stream.binder.kafka.KafkaMessageChannelBinder$ProducerConfigurationMessageHandler@7d3bbc0b]; nested exception is org.apache.kafka.common.KafkaException: TransactionalId my-transaction-3: Invalid transition attempted from state IN_TRANSACTION to state IN_TRANSACTION, failedMessage=GenericMessage [payload=byte[13], headers={my-transaction-id=my-id-7, id=d31656af-3286-99b0-c736-d53aa57a5e65, contentType=application/json, timestamp=1514384107399}]
at org.springframework.integration.handler.AbstractMessageHandler.handleMessage(AbstractMessageHandler.java:153)
at org.springframework.cloud.stream.binder.AbstractMessageChannelBinder$SendingHandler.handleMessageInternal(AbstractMessageChannelBinder.java:575)
- What does this error means?
- Is Something missing with my configuration?
- Do I need to implement my the Source or the Sink differently when transactions is enabled?
UPDATE: I opened an issue on the project's github, please refer to the discussion there.
Couldn't find an example of how to use Spring Cloud Stream with Kafka binding + Trasanctions enabled
To reproduce, need to created a simple maven project with spring boot version "2.0.0.M5" and "spring-cloud-stream-dependencies" version "Elmhurst.M3", and to created a simple application with this configuration:
server:
port: 8082
spring:
kafka:
producer:
retries: 5555
acks: "all"
cloud:
stream:
kafka:
binder:
autoAddPartitions: true
transaction:
transactionIdPrefix: my-transaction-
bindings:
output1:
destination: test10
group: test111
binder: kafka
input1:
destination: test10
group: test111
binder: kafka
consumer:
partitioned: true
I also created simple Source and Sink classes:
@EnableBinding(SampleSink.MultiInputSink.class)
public class SampleSink {
@StreamListener(MultiInputSink.INPUT1)
public synchronized void receive1(Message<?> message) {
System.out.println("["+Thread.currentThread().getId()+"] Received message " + message);
}
public interface MultiInputSink {
String INPUT1 = "input1";
@Input(INPUT1)
SubscribableChannel input1();
}
}
and:
@EnableBinding(SampleSource.MultiOutputSource.class)
public class SampleSource {
AtomicInteger atomicInteger = new AtomicInteger(1);
@Bean
@InboundChannelAdapter(value = MultiOutputSource.OUTPUT1, poller = @Poller(fixedDelay = "1000", maxMessagesPerPoll = "1"))
public synchronized MessageSource<String> messageSource1() {
return new MessageSource<String>() {
public Message<String> receive() {
String message = "FromSource1 "+atomicInteger.getAndIncrement();
m.put("my-transaction-id","my-id-"+ UUID.randomUUID());
return new GenericMessage(message, new MessageHeaders(m));
}
};
}
public interface MultiOutputSource {
String OUTPUT1 = "output1";
@Output(OUTPUT1)
MessageChannel output1();
}
}
