codelipenghui opened a new issue #3185: Re-delivery un-acked message repeated in different consumers URL: https://github.com/apache/pulsar/issues/3185 #### Expected behavior Re-delivery un-acked message should dispatch message to one consumer in a period of ack timout. #### Actual behavior Found that more than one consumer receive the redelivery message at the same time. ``` [Thu Dec 13 16:55:22 CST 2018] [f48e8] Hello Pulsar15.610505468878621 [Thu Dec 13 16:55:27 CST 2018] [0338e] Hello Pulsar15.610505468878621 [Thu Dec 13 16:55:27 CST 2018] [f48e8] Hello Pulsar15.610505468878621 [Thu Dec 13 16:55:32 CST 2018] [0338e] Hello Pulsar15.610505468878621 [Thu Dec 13 16:55:32 CST 2018] [f48e8] Hello Pulsar15.610505468878621 [Thu Dec 13 16:55:37 CST 2018] [0338e] Hello Pulsar15.610505468878621 [Thu Dec 13 16:55:37 CST 2018] [f48e8] Hello Pulsar15.610505468878621 [Thu Dec 13 16:55:42 CST 2018] [0338e] Hello Pulsar15.610505468878621 [Thu Dec 13 16:55:42 CST 2018] [f48e8] Hello Pulsar15.610505468878621 [Thu Dec 13 16:55:47 CST 2018] [0338e] Hello Pulsar15.610505468878621 [Thu Dec 13 16:55:47 CST 2018] [f48e8] Hello Pulsar15.610505468878621 [Thu Dec 13 16:55:52 CST 2018] [0338e] Hello Pulsar15.610505468878621 [Thu Dec 13 16:55:52 CST 2018] [f48e8] Hello Pulsar15.610505468878621 [Thu Dec 13 16:55:57 CST 2018] [0338e] Hello Pulsar15.610505468878621 [Thu Dec 13 16:55:57 CST 2018] [f48e8] Hello Pulsar15.610505468878621 [Thu Dec 13 16:56:02 CST 2018] [0338e] Hello Pulsar15.610505468878621 [Thu Dec 13 16:56:02 CST 2018] [f48e8] Hello Pulsar15.610505468878621 ``` #### Steps to reproduce Here is the test case: ```java package com.zhaopin.pulsar.issues; import org.apache.pulsar.client.api.Consumer; import org.apache.pulsar.client.api.Message; import org.apache.pulsar.client.api.Producer; import org.apache.pulsar.client.api.PulsarClient; import org.apache.pulsar.client.api.PulsarClientException; import org.apache.pulsar.client.api.Schema; import org.apache.pulsar.client.api.SubscriptionType; import java.util.Date; import java.util.concurrent.TimeUnit; public class MultiConsumerRedeliveryIssue { public static void main(String[] args) throws PulsarClientException { String TOPIC = "persistent://public/default/multi-consumer-redelivery-test3"; PulsarClient client = PulsarClient.builder() .maxNumberOfRejectedRequestPerConnection(50) .serviceUrl("pulsar://172.17.5.175:6650") .build(); Producer<byte[]> producer = client.newProducer(Schema.BYTES) .topic(TOPIC) .sendTimeout(500, TimeUnit.MILLISECONDS) .create(); Consumer<byte[]> consumer = client.newConsumer(Schema.BYTES) .topic(TOPIC) .subscriptionName("test") .subscriptionType(SubscriptionType.Shared) .ackTimeout(5, TimeUnit.SECONDS) .subscribe(); Consumer<byte[]> consumer2 = client.newConsumer(Schema.BYTES) .topic(TOPIC) .subscriptionName("test") .subscriptionType(SubscriptionType.Shared) .ackTimeout(5, TimeUnit.SECONDS) .subscribe(); new Thread(() -> { try { do { Message<byte[]> message = consumer.receive(); System.out.println("[" + new Date() + "] [" + consumer.getConsumerName() + "] " + new String(message.getValue())); } while (true); } catch (PulsarClientException e) { e.printStackTrace(); } }).start(); new Thread(() -> { try { do { Message<byte[]> message = consumer2.receive(); System.out.println("[" + new Date() + "] [" + consumer2.getConsumerName() + "] " + new String(message.getValue())); } while (true); } catch (PulsarClientException e) { e.printStackTrace(); } }).start(); producer.send(("Hello Pulsar" + Math.random() * 100).getBytes()); } } ``` #### System configuration **Pulsar version**: 2.2.0
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