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Luis Araujo commented on KAFKA-10334: ------------------------------------- [~ChrisEgerton] I didn't find that issue when creating this one, but totally agree with you. I tested both with 2.1.0 and 2.3.0 Kafka client version and the issue happens. Not sure if you want me to add the detail in the linked issue about the *.get* function call on the Future which makes the exception to be thrown and no more silent data loss to happen. > Transactions not working properly > --------------------------------- > > Key: KAFKA-10334 > URL: https://issues.apache.org/jira/browse/KAFKA-10334 > Project: Kafka > Issue Type: Bug > Components: clients, producer > Affects Versions: 2.1.0, 2.3.0 > Reporter: Luis Araujo > Priority: Major > > I'm using transactions provided by Kafka Producer API in a Scala project > built with SBT. The dependency used in the project is: > {code:java} > "org.apache.kafka" % "kafka-clients" % "2.1.0" {code} > I followed the documentation and I was expecting that transactions fail when > I call *.commitTransaction* if some problem is raised when sending a message > like it's described in the > [documentation|https://kafka.apache.org/10/javadoc/org/apache/kafka/clients/producer/KafkaProducer.html#send-org.apache.kafka.clients.producer.ProducerRecord-org.apache.kafka.clients.producer.Callback-]. > Unfortunately, when testing this behaviour using a message larger than the > size accepted by the Kafka broker/cluster, the transactions are not working > properly. > I tested with a 3 Kafka broker cluster with 1MB message max size (default > value): > - when the message has 1MB, the transaction is aborted and an exception is > raised when calling *commitTransaction()* > - when the message is bigger than 1MB, the transaction is completed > successfully *without* the message being written. No exception is thrown. > As an example, this means that when I produce 9 messages with 1 KB and 1 > message with 1.1MB in the same transaction, the transaction is completed but > only 9 messages are written to the Kafka cluster. > I tested this behaviour with Kafka version 2.1.0 and 2.3.0 in both Kafka > cluster and Kafka Producer API. > The configs that I'm using to create the KafkaProducer in order to use > transactions: > {code:java} > new Properties() { > { > put(BOOTSTRAP_SERVERS_CONFIG, > "localhost:29092,localhost:29093,localhost:29094") > put(ACKS_CONFIG, "-1") > put(MAX_IN_FLIGHT_REQUESTS_PER_CONNECTION, "1") > put(KEY_SERIALIZER_CLASS_CONFIG, > Class.forName(classOf[StringSerializer].getName)) > put(VALUE_SERIALIZER_CLASS_CONFIG, > Class.forName(classOf[ByteArraySerializer].getName)) > put(CLIENT_ID_CONFIG, "app") > put(TRANSACTIONAL_ID_CONFIG, "app") > put(ENABLE_IDEMPOTENCE_CONFIG, "true") > } > } > {code} -- This message was sent by Atlassian Jira (v8.20.1#820001)