Azure服务总线-PeekBatchAsync返回的消息少于预期的消息 [英] Azure Service Bus - PeekBatchAsync returning less messages than expected
问题描述
在Azure Service Bus主题中，我有一个包含1000多个消息的订阅.这些消息由工作角色使用. 出于监视目的，我希望先查看10条消息，以查看正在等待处理的消息类型.为了完成该任务，我创建了一个subscriptionclient，并调用了PeekBatchAsync方法.奇怪的行为是有时PeekBatchAsync返回少于10条消息(即2或4条消息).
In an Azure Service Bus Topic I have a subscription with more than 1000 messages. These messages are consumed by a worker role. For monitoring purposes, I want to peek first 10 messages, to see what kind of messages are waiting to be processed. To accomplish that task I create a subscriptionclient and I call method PeekBatchAsync . The strange behavior is that sometimes PeekBatchAsync returns less than 10 messages (i.e. 2 or 4 messages).
代码示例:
Dim subscriptionClient As SubscriptionClient = messagingFactory.CreateSubscriptionClient(topicName, subscriptionName)
Dim messages = Await subscriptionClient.PeekBatchAsync(10)
更多信息以澄清上下文:
More information to clarify the context:
- 我确定订阅包含超过1000条消息
- 该主题是使用EnablePartitioning = True 创建的
- 我正在使用Microsoft.ServiceBus v.2.3.4.0库
- 我正在使用会话
- 在大多数情况下，我收到的邮件数量正确(10)，有时我收到的邮件较少.我不知道要复制该问题的确切条件是什么
我的问题是:为什么有时该方法返回的消息少于预期的?
My question is : Why sometimes the method returns less messages than expected?
推荐答案
我猜想Azure-ServiceBus的文档 ReceiveBatch-方法在PeekBatchAsync的情况下也适用.基本上说:可能会返回邮件数量(在您的情况下为10)，但不能保证.
I guess the documentation for the Azure-ServiceBus ReceiveBatch-method also applies in the case of PeekBatchAsync. Basically it says: The max. number of messages (in your case 10) might be returned but it's not guaranteed.
使用两个参数(int messageCount, TimeSpan serverWaitTime)应用重载时，我会遇到更好的结果.
I experienced better results when applying the overload taking two parameters: (int messageCount, TimeSpan serverWaitTime), where one can define a wait-time.
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