apache / apache/pulsar-client-go

Got " Failed to create consumer at reconnect" when stop pulsar broker first and restart it later

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Dominant language
Go
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Description

#### Expected behavior

Expect no error happens.

#### Actual behavior

image

#### Steps to reproduce

1. run the go example program
2. stop pulsar broker
3. observe the output of go example, start pulsar broker **after** you see this error message: `error="dial tcp [::1]:6650: connect: connection refused" remote_addr="pulsar://localhost:6650"`
4. you can see the `Failed to create consumer at reconnect` now.

program example to reproduce:

```
package main

import (
"context"
"fmt"
"log"

"net/http"
_ "net/http/pprof"

"github.com/apache/pulsar-client-go/pulsar"
)

func main() {

go func() {
log.Println(http.ListenAndServe("localhost:6060", nil))
}()

// Create a Pulsar client
client, err := pulsar.NewClient(pulsar.ClientOptions{
URL: "pulsar://localhost:6650",
})
if err != nil {
log.Fatalf("Could not create Pulsar client: %v", err)
}
defer client.Close()

consumer, err := client.Subscribe(pulsar.ConsumerOptions{
Topic: "my-topic",
SubscriptionName: "my-subscription",
Type: pulsar.KeyShared,
})
if err != nil {
fmt.Printf("Could not create consumer: %v\n", err)
return
}
go func() {
for {
msg, err := consumer.Receive(context.Background())
if err != nil {
log.Printf("Error receiving message: %v", err)
break
}

// Process the message
fmt.Printf("Received message msgId: %v -- content: '%s'\n",
msg.ID(), string(msg.Payload()))

// Acknowledge the message
consumer.Ack(msg)
}
}()

// Keep the main function alive to allow the goroutine to run
select {}
}

```

#### System configuration
Macbook Pro 2021
go version: 1.23.0
pulsar go sdk version: 0.13.1

pulsar broker version: latest docker image. I run it with this command:
`docker run -it \
-p 6650:6650 \
-p 8080:8080 \
apachepulsar/pulsar:latest \
bin/pulsar standalone`

Contributor guide

Open the contributing guide

Research direction

Reproduce the failure with the provided Go example by stopping and restarting the Pulsar broker, then trace the client.Subscribe consumer reconnect path after the connection-refused error. Done means the consumer reconnects without reporting "Failed to create consumer at reconnect" and can continue receiving messages after the broker returns.

Written by the indexing model from the issue text.

Assessment

Tech stack
go
Domain
distributed-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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