How to check in C # that a message sent by a producer has successfully reached the Kafka server?

Question

I can't find a way to confirm that a message sent to the Kafka server has been received correctly by the server. I need a confirmation that the message was sent and received correctly in order to act on the C # code in case the message was not received by the server. I have read that there is a property called ack to configure that, but I can't find how to receive such confirmation.

Answer 1

You'd use a DeliveryReport handler

Refer documentation - https://docs.confluent.io/clients-confluent-kafka-dotnet/current/overview.html

Async

var t = producer.ProduceAsync("topic", new Message<Null, string> { Value="hello world" });
t.ContinueWith(task => {
    if (task.IsFaulted)
    {
        ...
    }
    else
    {
        ...

        Console.WriteLine($"Wrote to offset: {task.Result.Offset}");
    }
});

Synchronous

public static void handler(DeliveryReport<Null, string>)
{
    ...
}

public static process(...)
{
    ...
    producer.Produce(
        "my-topic", new Message<Null, string> { Value = "hello world" }, handler);
}

Answer 2

This worked for me:

    bool messagePublished = false;
    var result = await _producer.ProduceAsync(yourTopic, yourMessage);

    if (result.Status == PersistenceStatus.Persisted)
        messagePublished = true;

Notice that you have multiple PersistenceStatus values.

You can find more info on the official confluent documentation.