Azure ServiceBus ReceiveDeferredMessageAsync() 失败

Question

我正在尝试在 Azure ServiceBus 中实现“消息延迟”模式，但无法让基本示例正常工作。我正在使用Microsoft.Azure.ServiceBus v5.0.0 并遵循this SO question 和this Microsoft Documentation 的建议。

// Send a message
var sender = new MessageSender("my_sb_connection_string", "my_queue_name", RetryPolicy.Default);
await sender.SendAsync(new Message());

// Receive the message, defer it and then receive the deferred message
var receiver = new MessageReceiver("my_sb_connection_string", "my_queue_name", 
                                   ReceiveMode.PeekLock, RetryPolicy.Default);

var msg = await receiver.ReceiveAsync();

await receiver.DeferAsync(msg.SystemProperties.LockToken);

var deferredMsg = await receiver.ReceiveDeferredMessageAsync(msg.SystemProperties.SequenceNumber);

每次我打电话给ReceiveDeferredMessageAsync()，我都会得到一个异常：

Microsoft.Azure.ServiceBus.MessageNotFoundException: Messages not found. One or more sequence numbers missing. 

我确定我做错了一些简单的事情，但我看不出它可能是什么。

Answer 1

问题原来是我将队列的“最大传递计数”设置为 1 - 消息进入 DLQ（显然）是因为它达到了最大传递计数。

将 Max Delivery Count 更改为大于 1 的值允许 `DeferAsync() 调用正确地将消息标记为延迟。

这对我来说似乎是一个错误。 https://github.com/Azure/azure-service-bus/issues/375