Javascript : to explicitly send a message to dead letter queue in azure function app which is service bus triggered

Question

I have service bus triggered azure function app. In the function app based on some condition i want to transfer the message to dead letter queue.

const sbClient = new ServiceBusClient(connectionString);
    const receiver = sbClient.createReceiver('chattopic', 'test', {
        receiveMode: "receiveAndDelete"
    });
    console.log(serviceBusMessage);
   await receiver.deadLetterMessage(serviceBusMessage, {
        deadLetterReason: "Error",
        deadLetterErrorDescription: "Error."
    })

However i get the following error

Result: Failure
Exception: The operation is not supported in 'receiveAndDelete' receive mode.
Stack: Error: The operation is not supported in 'receiveAndDelete' receive mode.

I get same error even when i change the receiveMode to peekLock. Can anyone please help here.

score 0 · Accepted Answer · answered Nov 17 '22 at 16:38

I think the reason you get this exception is because you are trying to dead letter the messages using the servicebusClient but those messages weren't fetched using that service bus client.
So, to remove this exception we would need the same client used by the service bus trigger to fetch the messages, but that is not available.
Also, you don't even need to create a service bus client, receiver etc. Even throwing an exception will dead letter the message.

module.exports = async  function(context, mySbMsg) {
throw new Error('Exception');
}

Before sending the message: enter image description here

After sending the message: enter image description here

Local terminal : enter image description here

Javascript : to explicitly send a message to dead letter queue in azure function app which is service bus triggered

1 Answers1