我使用以下命令将生产者配置为 10 秒超时transaction.timeout.ms
财产。然而,交易似乎在 60 秒后中止,这个时间要长得多。
请看下面的程序:
Properties properties = new Properties();
properties.setProperty("bootstrap.servers", brokerConnectionString);
properties.setProperty("transactional.id", "my-transactional-id");
properties.setProperty("transaction.timeout.ms", "5000");
// start the first producer and write one event
KafkaProducer<String, String> producer =
new KafkaProducer<>(properties, new StringSerializer(), new StringSerializer());
producer.initTransactions();
producer.beginTransaction();
producer.send(new ProducerRecord<>("topic", "value"));
// note the transaction is left non-completed
// start another producer with different txn.id and write second event
properties.setProperty("transactional.id", "another-transactional-id");
KafkaProducer<String, String> producer2 =
new KafkaProducer<>(properties, new StringSerializer(), new StringSerializer());
producer2.initTransactions();
producer2.beginTransaction();
producer2.send(new ProducerRecord<>("topic", "value2"));
producer2.commitTransaction();
// consume the events using read-committed
Properties consumerProps = new Properties();
consumerProps.setProperty("bootstrap.servers", brokerConnectionString);
consumerProps.setProperty("group.id", "my-group");
consumerProps.setProperty("auto.offset.reset", "earliest");
consumerProps.setProperty("isolation.level", "read_committed");
KafkaConsumer<String, String> consumer =
new KafkaConsumer<>(consumerProps, new StringDeserializer(), new StringDeserializer());
consumer.subscribe(singleton("topic"));
while (true) {
for (ConsumerRecord<String, String> record : consumer.poll(Duration.ofSeconds(1))) {
logger.info(record.toString());
}
}
The value2
大约 60 秒后打印,这是默认值transaction.timeout.ms
范围。难道是我对房产的理解有误?