2 posts tagged with "Azure Service Bus"

This week in Topaz: Azure SQL arrives as a full first-class service with Servers and Databases. Service Bus gains a real AMQP data plane with queue management and message locking. Blob Storage completes the User Delegation SAS flow. Entra ID adds Device Code and form_post support. Container Registry grows Tasks and Runs automation APIs. And Topaz ships its first Python SDK.

I wanted to see whether Topaz could run a real PeekLock consumer, not just accept AMQP frames and pass a basic SDK smoke test. The first MassTransit run failed in two different ways. CompleteAsync waited 60 seconds for a management response that never arrived, and after fixing that, the consumer still stalled after a single message.

That was the point where "supports AMQP" stopped being a useful statement. This post explains what MassTransit was actually doing on the wire, which parts of the protocol Topaz was still missing, and which traces made the root causes obvious.

The concrete examples use MassTransit and the Azure Service Bus SDK for .NET. The AMQP behaviour described applies to any framework driving PeekLock, but the code is C#. If you are not working in .NET, the protocol sections may still be useful context for evaluating any AMQP emulator.