[GitHub] [pulsar-client-go] wolfstudy commented on issue #233: Reader cannot read first message produced to new topic

[GitBox <gi...@apache.org>]

wolfstudy commented on issue #233:
URL: https://github.com/apache/pulsar-client-go/issues/233#issuecomment-619390303


   @frankjkelly Thanks feedback. 
   
   Maybe we can try the following methods:
   
   ```
    consumer, err := writerClient.Subscribe(pulsar.ConsumerOptions{
   		Topic:                       signalId,
   		SubscriptionName:            "Consumah",
   		SubscriptionInitialPosition: pulsar.SubscriptionPositionEarliest,
   		Type:                        pulsar.Exclusive,
   	})
   	if err != nil {
   		log.Fatal(err)
   	}
   	defer consumer.Close()
   ```
   
   Output:
   
   ```
   Received message msgId: &pulsar.messageID{ledgerID:10, entryID:1, batchIdx:0, partitionIdx:0, tracker:(*pulsar.ackTracker)(nil), consumer:(*pulsar.partitionConsumer)(0xc001074680)} -- content: 'my message'
   ```
   
   By default, the consumer of pulsar will start receiving messages from the `latest` position. If you want to receive messages sent before, you can set the Consumer's SubscriptionInitialPosition option to `SubscriptionPositionEarliest`.


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