Getting "Invalid header" error when invoking `message.ack()`

I get this error when I invoke message.ack():

Broker reported error: Invalid header [some-file].js:78 Additional details: “ACK” must include a valid “id” header

Initially I was invoking .ack() with no arguments as shown in the docs, i.e. just simply message.ack().

However after first noticing the error and seeing that those docs state that all 3 arguments are not optional, I changed to this:

const messageId = message.headers['message-id'] || undefined;
const subscriptionId = message.headers.subscription || undefined;
message.ack(messageId, subscriptionId, {});

I still got the error, so I switched to this:

const messageId = message.headers['message-id'] || undefined;
const subscriptionId = message.headers.subscription || undefined;
message.ack(messageId, subscriptionId, message.headers);

And I’m still getting the error. How can I fix this error? Thanks!

[kum-deepak]

I could notice one critical difference, your log output does not show an ack header in the message (below is a sample from my system with RabbitMQ 3.8.0):

{
    content-length:19
    ack:T_sub-0@@session-TjU8h1vFUcIq6w8APXdl2Q@@1
    redelivered:false
    message-id:T_sub-0@@session-TjU8h1vFUcIq6w8APXdl2Q@@1
    destination:/queue/test01
    subscription:sub-0
    content-length:19
}

Are you setting correct headers when subscribing? Please see https://stomp-js.github.io/guide/stompjs/using-stompjs-v5.html#acknowledgment. You need to set { ack: 'client' } to use ack/nack.

[CodeWithOz]

Thanks! I needed to add { ack: 'client' } when subscribing.