[GitHub] [pulsar] archfish commented on issue #6535: [BUG]Msg duplicate when consumer in Failover mode

[GitBox]

archfish commented on issue #6535: [BUG]Msg duplicate when consumer in Failover 
mode
URL: https://github.com/apache/pulsar/issues/6535#issuecomment-598612987
 
 
   ```golang
   package main
   
   import (
        "context"
        "fmt"
        "log"
        "time"
   
        "github.com/apache/pulsar-client-go/pulsar"
   )
   
   func main() {
        client, err := pulsar.NewClient(pulsar.ClientOptions{URL: 
"pulsar://my.pulsar.lan:6650"})
        if err != nil {
                log.Fatal(err)
        }
   
        defer client.Close()
   
        consumer, err := client.Subscribe(pulsar.ConsumerOptions{
                Topic:            "shared",
                SubscriptionName: "my-sub",
                Type:             pulsar.Failover,
        })
        if err != nil {
                log.Fatal(err)
        }
        defer consumer.Close()
   
        for i := 0; i < 10; i++ {
                msg, err := consumer.Receive(context.Background())
                if err != nil {
                        log.Fatal(err)
                }
   
                fmt.Printf("Received message msgId: %#v -- content: '%s'\n",
                        msg.ID(), string(msg.Payload()))
   
                // consumer.Ack(msg)
                time.Sleep(10 * time.Second)
        }
   
        if err := consumer.Unsubscribe(); err != nil {
                log.Fatal(err)
        }
   }
   ```
   
   ```shell
   # at least has one message in topic
   go run examples/consumer/consumer.go
   # after consumer started
   go run examples/consumer/consumer.go
   ```

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