App

This application demonstrates an issue with Azure Function Apps using Service Bus binding, where a request is marked as successful even though it fails with an error.

Setup

Before deploying the application, you need to:

1. Create a Service Bus namespace.
2. Create a Function App.
3. Within the Service Bus, create a queue named servicebussuccessonerror.
4. Set the AzureWebJobsServiceBus environment variable with the connection string to the Service Bus.

Reproducing the Issue

Once everything is configured, send a message to the queue. You will observe that:

• The request is marked as successful in the logs.
• The message is redirected to the Dead Letter Queue (DLQ) due to a failure in the function execution.

Observations

Logs

The following image shows that the request is incorrectly marked as Success: True despite the function returning an error:

Dead Letter Queue

This image shows that the message is correctly redirected to the DLQ: