[英]Dead letter queue not cleared
I have a few messages that were dead lettered automatically due to an exceeded retry count. 我有一些邮件由于超出重试次数而被自动删除。 Now I'm trying the re-queue them like this:
现在,我尝试像这样重新排队:
while ((msg = DeadLetterQueueClient.Receive()) != null)
{
var body = msg.GetBody<MyModel>();
QueueClient.Send(new BrokeredMessage(body));
}
I receive all dead lettered messages, however they don't clear from the queue. 我收到了所有字母不正确的邮件,但是它们并未从队列中清除。 Every time I start this code, the same messages are received again.
每次我启动此代码时,都会再次收到相同的消息。
What's wrong? 怎么了?
PS: The queue actually has dead lettering turned off, according to the old Azure portal. PS:根据旧的Azure门户,队列实际上已关闭了死字母。 The messages only show up as dead lettered in Visual Studio Server Explorer and I also receive them with the above code.
这些消息在Visual Studio Server Explorer中仅显示为死信,并且我也收到带有上述代码的消息。
Mark the message as complete and it should be deleted from the dead letter queue 将邮件标记为完成,应将其从死信队列中删除
while ((msg = DeadLetterQueueClient.Receive()) != null)
{
var body = msg.GetBody<MyModel>();
QueueClient.Send(new BrokeredMessage(body));
msg.Complete();
}
如果要保留标题属性,则可能要使用msg.Clone()而不是将正文复制到新的BrokeredMessage中。
You can also try this code to delete a Dead-Lettered message from Queues. 您也可以尝试使用此代码从“队列”中删除“不写信”消息。
MessageReceiver fromQueueClient = null;
MessagingFactory factory = MessagingFactory.CreateFromConnectionString(connectionString);
fromQueueClient = await factory.CreateMessageReceiverAsync(_entityName, ReceiveMode.PeekLock);
BrokeredMessage _message = await fromQueueClient.ReceiveAsync(SequenceNumber);
await _message.CompleteAsync();
using System;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Microsoft.Azure.ServiceBus;
using Microsoft.Azure.ServiceBus.Core;
using System.Text;
using System.Collections.Generic;
using System.Threading.Tasks;
namespace ClearDeadLetterQ
{
[TestClass]
public class UnitTest1
{
const string ServiceBusConnectionString = "Endpoint=sb://my-domain.servicebus.windows.net/;SharedAccessKeyName=RootManageSharedAccessKey;SharedAccessKey=yoursharedaccesskeyhereyoursharedaccesskeyhere";
[TestMethod]
public async Task TestMethod1()
{
await this.ClearDeadLetters("my.topic.name", "mysubscriptionname/$DeadLetterQueue");
}
public async Task ClearDeadLetters(string topicName, string subscriptionName)
{
var messageReceiver = new MessageReceiver(ServiceBusConnectionString, EntityNameHelper.FormatSubscriptionPath(topicName, subscriptionName), ReceiveMode.PeekLock);
var message = await messageReceiver.ReceiveAsync();
while ((message = await messageReceiver.ReceiveAsync()) != null)
{
await messageReceiver.CompleteAsync(message.SystemProperties.LockToken);
}
await messageReceiver.CloseAsync();
}
}
}
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