Unexpected queues added after upgrading to NServiceBus 8

[saasen]

Describe the bug

Description

After upgrading a SendOnly endpoint to NServiceBus 8, audit-queues started to be created. We are doing a call to AuditProcessedMessagesTo, which might be why, but should that be ignored in SendOnly endpoints?

Expected behavior

That the audit-queues are not created (?).

Actual behavior

Audit-queues are created. Not sure if this has any effect other than to create un-needed queues.

Versions

• NServiceBus v8.0.3

Steps to reproduce

• Create a SendOnly endpoint with version 7 of NServiceBus with Azure Service Bus transport with a call to AuditProcessedMessagesTo
• Run the endpoint - no queues are created
• Upgrade to NServiceBus 8 (and related packages)
• Run the endpoint again

An .audit queue is now created, but not in use since this is a send-only endpoint.

Relevant log output

No response

Additional Information

No response

[DavidBoike]

Thanks for the bug report!

So that I can understand clearly, can I ask:

1. If you don't use AuditProcessedMessagesTo(), no audit queue is created, right?
2. Given the configuration mismatch between specifying an audit queue on a send-only endpoint, I assume this is one of those "well that was a weird difference" situations and that this had no ill effect on the system, correct?

[saasen]

Sure.

1. I haven't actually tried that, but I would guess so?
2. I haven't seen that any messages has been sent to / processed on those endpoints. So yeah, I think you are right it's just a weird difference.

However, we also call SendFailedMessagesTo() on those endpoints. An error queue is not created for send-only endpoints. I would say it's inconsistent behaviour, but it doesn't really affect anything. I was just a little afraid if all our send-only endpoints now suddenly were fully blown processing endpoints.

[DavidBoike]

I've fixed the bug in #6740.

We're currently planning an NServiceBus 8.1.0 release sometime in the next few weeks and this will be included in that.

[saasen]

Thanks a lot! I appreciate the fast fix! 👏