[BUG] MessageToPocoConverter overrides any custom ServiceBusReceivedMessage open converters

Library name and version

Microsoft.Azure.WebJobs.Extensions.ServiceBus 5.7.0

Describe the bug

Hey,

As in title, I’m trying to add my custom open converter for ServiceBusReceivedMessage:

...
context.AddOpenConverter<ServiceBusReceivedMessage, MessageEnvelope<OpenType>>(typeof(GenericMessageEnvelopeConverter<>));
...

also tried with OpenType.Poco

...
context.AddOpenConverter<ServiceBusReceivedMessage, MessageEnvelope<OpenType.Poco>>(typeof(GenericMessageEnvelopeConverter<>));
...

Here is my open converter:

internal class GenericMessageEnvelopeConverter<T> : IConverter<ServiceBusReceivedMessage, MessageEnvelope<T>>

Expected behavior

My custom open converter is called instead of MessageToPocoConverter.

Actual behavior

Every time when queue triggers:

 [FunctionName(nameof(ServiceBusStart))]
        public async Task ServiceBusStart(
            [ServiceBusTrigger("%queueName%", Connection = "SbConnString")] MessageEnvelope<MyCustomType> msg,
            [DurableClient] IDurableOrchestrationClient starter)

it calls MessageToPocoConverter - which is added in ServiceBusExtensionProvider - well I am not 100% it calls MessageToPocoConverter, but I get this error when using MessageEnvelope without parameterless constructor .

I believe that I’ve wired up everything correctly since when I change my custom converter from open to regular one:

...
context.AddConverter<ServiceBusReceivedMessage, int>(new GenericMessageEnvelopeConverter());
...

the converter is called as expected

Reproduction Steps

Create custom ServiceBusReceivedMessage open converter and trigger it with message.

Environment

local machine Windows 10, netcoreapp3.1, VS 2022

[JoshLove-msft]

Issue moved to Azure/azure-webjobs-sdk #2925 via Zenhub

[jsquire]

Thank you for your feedback. Tagging and routing to the team member best able to assist.