congbobo184 opened a new issue #10431:
URL: https://github.com/apache/pulsar/issues/10431
example:
Transaction abort message1, message2 and then clear incomingMessages.
after incomingMessage cleared the message3 can add in incomingMessages.
This time we cumulativeAck message3 with txn will lose message1 and message2.
```
@Test
public void transactionCumulativeAck() throws Exception {
String topic = NAMESPACE1 + "/txn-timeout";
@Cleanup
Consumer<String> consumer = pulsarClient.newConsumer(Schema.STRING)
.topic(topic)
.subscriptionName("test")
.subscribe();
@Cleanup
Producer<String> producer = pulsarClient.newProducer(Schema.STRING)
.topic(topic)
.sendTimeout(0, TimeUnit.SECONDS)
.enableBatching(false)
.producerName("txn-timeout")
.create();
producer.send("Hello Pulsar one!");
producer.send("Hello Pulsar two!");
Transaction transaction = pulsarClient
.newTransaction()
.withTransactionTimeout(3, TimeUnit.SECONDS)
.build().get();
Message<String> message = consumer.receive();
System.out.println(message.getValue());
consumer.acknowledgeCumulativeAsync(message.getMessageId(),
transaction).get();
transaction.abort();
transaction = pulsarClient
.newTransaction()
.withTransactionTimeout(3, TimeUnit.SECONDS)
.build().get();
// it may receive Hello Pulsar two!
Message<String> reReceiveMessage = consumer.receive(2,
TimeUnit.SECONDS);
System.out.println(reReceiveMessage.getValue());
}
```
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