将 netMsmqBinding 绑定与 IIS 托管一起使用时 WCF 服务托管失败

Question

使用 IIS 托管时的 WCF 服务失败。该服务的 web.config 是

<system.serviceModel>
    <bindings>
        <netMsmqBinding>
            <binding name="msmqbindingnontransactionalnonsecure" exactlyOnce="False">
                <security mode="None" />
            </binding>
        </netMsmqBinding>
    </bindings>
    <services>
        <service name="MsmqService.MsmqService">
            <endpoint address="net.msmq://localhost/private/msmqpoc/MsmqService.svc"  binding="netMsmqBinding" bindingConfiguration="msmqbindingnontransactionalnonsecure" contract="MsmqWCFService.IMsmqContract" />
        </service>
    </services>
    <behaviors>
        <serviceBehaviors>
            <behavior>
                <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
                <serviceMetadata httpGetEnabled="true"/>
                <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
                <serviceDebug includeExceptionDetailInFaults="false"/>
            </behavior>
        </serviceBehaviors>
    </behaviors>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
</system.serviceModel>

服务合同是

[ServiceContract]
public interface IMsmqContract
{
    [OperationContract(IsOneWay = true)]
    void SendMessage(string message);
}

在 IIS 中托管服务时，显示以下消息：

Server Error in '/msmqpoc' Application.
--------------------------------------------------------------------------------

Binding validation failed because the binding's ExactlyOnce property is set to true while the destination queue is non-transactional. The service host cannot be opened. Resolve this conflict by setting the ExactlyOnce property to false or creating a transactional queue for this binding. 
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.InvalidOperationException: Binding validation failed because the binding's ExactlyOnce property is set to true while the destination queue is non-transactional. The service host cannot be opened. Resolve this conflict by setting the ExactlyOnce property to false or creating a transactional queue for this binding.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.      
Stack Trace:
[InvalidOperationException: Binding validation failed because the binding's ExactlyOnce property is set to true while the destination queue is non-transactional. The service host cannot be opened. Resolve this conflict by setting the ExactlyOnce property to false or creating a transactional queue for this binding.]

配置已经设置为exactOnce=false，不知道为什么会出现这个错误，有什么帮助吗？

Answer 1

我只能推测您的服务没有选择正确的配置文件。我建议仔细检查一下。我看不出您发布的配置文件有任何问题。

有点偏离主题，我冒昧地考虑一下为什么要使用非事务性队列。您使用它们的唯一原因是您的整体架构是否可以容忍消息丢失。

例如，在某些低延迟系统中，消息最多只能在几秒钟内有价值，然后才会失效。因此，在这种情况下，您不需要使用事务队列。

如果您不能容忍消息丢失，则必须使用事务队列。