创建CreateBatchAsync并在VPN中连接时，Azure EventHub套接字异常10054

Question

当我在VPN中连接时，执行以下代码片段时，我收到以下错误及其原因当我没有连接到VPN时，这段代码运行良好，有人能帮我纠正这个问题的步骤吗(tnc.servicebus.windows.net-端口5671|5672-连接到VPN后状态为成功(

using System;
using System.Text;
using System.Threading.Tasks;
using Azure.Messaging.EventHubs;
using Azure.Messaging.EventHubs.Producer;
namespace _01_sendevents
{
    class Program
    {
        private const string connectionString = "Endpoint=sb://namespace.servicebus.windows.net/;SharedAccessKeyName=RootManageSharedAccessKey;SharedAccessKey=34567SDFGHJ4567vbnm#$%^&*";
        private const string eventHubName = "eventhubname";
        static async Task Main()
        {
            await using (var producerClient = new EventHubProducerClient(connectionString, eventHubName))
            {
                using EventDataBatch eventBatch = await producerClient.CreateBatchAsync();
                Random rnd = new Random();
                int randomNumber = rnd.Next(1, 7);
                for (int i = 0; i <= randomNumber; i++)
                {
                    eventBatch.TryAdd(new EventData(Encoding.UTF8.GetBytes(string.Format("Event-{0}", i.ToString()))));
                }
                await producerClient.SendAsync(eventBatch);
                Console.WriteLine("A batch of {0} events has been published.",randomNumber.ToString());
                Console.ReadLine();
            }
        }
    }
}

这是实际错误信息

Unhandled exception. System.Net.Sockets.SocketException (10054): An existing connection was forcibly closed by the remote host.
   at Microsoft.Azure.Amqp.Transport.TransportStream.EndRead(IAsyncResult asyncResult)
   at Microsoft.Azure.Amqp.Transport.TransportStream.<>c__DisplayClass22_0.<ReadAsync>b__1(IAsyncResult a)
   at System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean requiresSynchronization)
--- End of stack trace from previous location where exception was thrown ---
   at System.Net.FixedSizeReader.ReadPacketAsync(Stream transport, AsyncProtocolRequest request)
   at System.Net.Security.SslStream.ThrowIfExceptional()
   at System.Net.Security.SslStream.InternalEndProcessAuthentication(LazyAsyncResult lazyResult)
   at System.Net.Security.SslStream.EndProcessAuthentication(IAsyncResult result)
   at System.Net.Security.SslStream.EndAuthenticateAsClient(IAsyncResult asyncResult)
   at Microsoft.Azure.Amqp.Transport.TlsTransport.HandleOpenComplete(IAsyncResult result, Boolean syncComplete)
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.Azure.Amqp.ExceptionDispatcher.Throw(Exception exception)
   at Microsoft.Azure.Amqp.AsyncResult.End[TAsyncResult](IAsyncResult result)
   at Microsoft.Azure.Amqp.AmqpObject.OpenAsyncResult.End(IAsyncResult result)
   at Microsoft.Azure.Amqp.AmqpObject.EndOpen(IAsyncResult result)
   at Microsoft.Azure.Amqp.Transport.TlsTransportInitiator.HandleTransportOpened(IAsyncResult result)
   at Microsoft.Azure.Amqp.Transport.TlsTransportInitiator.OnTransportOpened(IAsyncResult result)
--- End of stack trace from previous location where exception was thrown ---
   at Azure.Messaging.EventHubs.Amqp.AmqpConnectionScope.CreateAndOpenConnectionAsync(Version amqpVersion, Uri serviceEndpoint, EventHubsTransportType transportType, IWebProxy proxy, String scopeIdentifier, TimeSpan timeout)
   at Microsoft.Azure.Amqp.FaultTolerantAmqpObject`1.OnCreateAsync(TimeSpan timeout)
   at Microsoft.Azure.Amqp.Singleton`1.GetOrCreateAsync(TimeSpan timeout)
   at Microsoft.Azure.Amqp.Singleton`1.GetOrCreateAsync(TimeSpan timeout)
   at Azure.Messaging.EventHubs.Amqp.AmqpConnectionScope.OpenProducerLinkAsync(String partitionId, TimeSpan timeout, CancellationToken cancellationToken)
   at Azure.Messaging.EventHubs.Amqp.AmqpProducer.CreateLinkAndEnsureProducerStateAsync(String partitionId, TimeSpan timeout, CancellationToken cancellationToken)
   at Azure.Messaging.EventHubs.Amqp.AmqpProducer.CreateLinkAndEnsureProducerStateAsync(String partitionId, TimeSpan timeout, CancellationToken cancellationToken)
   at Microsoft.Azure.Amqp.FaultTolerantAmqpObject`1.OnCreateAsync(TimeSpan timeout)
   at Microsoft.Azure.Amqp.Singleton`1.GetOrCreateAsync(TimeSpan timeout)
   at Microsoft.Azure.Amqp.Singleton`1.GetOrCreateAsync(TimeSpan timeout)
   at Azure.Messaging.EventHubs.Amqp.AmqpProducer.CreateBatchAsync(CreateBatchOptions options, CancellationToken cancellationToken)
   at Azure.Messaging.EventHubs.Amqp.AmqpProducer.CreateBatchAsync(CreateBatchOptions options, CancellationToken cancellationToken)
   at Azure.Messaging.EventHubs.Producer.EventHubProducerClient.CreateBatchAsync(CreateBatchOptions options, CancellationToken cancellationToken)
   at Azure.Messaging.EventHubs.Producer.EventHubProducerClient.CreateBatchAsync(CancellationToken cancellationToken)
   at _01_sendevents.Program.Main() in C:WorkWFM Analysisazurepoc1-sendeventsProgram.cs:line 22
   at _01_sendevents.Program.Main() in C:WorkWFM Analysisazurepoc1-sendeventsProgram.cs:line 35
   at _01_sendevents.Program.<Main>()

Answer 1

您看到的异常表明生产者无法与事件中心服务通信。尽管识别了正确的端口，但您的VPN似乎没有路由请求。

大多数情况下，当我们看到这种行为时，是由于环境阻塞了原始TCP流量。您可能需要考虑尝试使用web套接字，看看这是否有帮助。为此，您需要在创建客户端时指定一组选项。基本形式如下：

var options = new EventHubProducerClientOptions();
options.ConnectionOptions.TransportType = EventHubsTransportType.AmqpWebSockets;
var producerClient = new EventHubProducerClient(
    connectionString, 
    eventHubName, 
    options);

还有一个示例可以更详细地说明。