MassTransit - 无法关闭范围

Question

我在同一个IIS实例上运行了2个ASP.NET api，它们在同一个队列中使用MassTransit但仅用于发送。

在启动时，两个api都会创建自己的总线＆＃39;然而，它们似乎以某种方式相互冲突，最终两个总线队列都将消失，同样的错误将每隔几个小时反复发生：

ERROR - Failed to close scope MassTransit.RabbitMqTransport.Pipeline.RabbitMqBasicConsumer -rabbitmq://<host>/bus-DEV-API-w3wp-364yyynqbn68pfb5bdj5ic3kfr?durable=false&autodelete=true&prefetch=4
System.Threading.Tasks.TaskCanceledException: A task was canceled.
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MassTransit.RabbitMqTransport.Pipeline.RabbitMqBasicConsumer.<Stop>d__32.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at MassTransit.Util.TaskSupervisorExtensions.<>c__DisplayClass2_0.<<CreateParticipant>b__0>d.MoveNext()

这是我的配置，它出现在我的WebApiApplication的Application_Start（）中，并被分配给一个公共静态变量：

        MassTransit.Bus.Factory.CreateUsingRabbitMq(cfg =>
        {
            cfg.Host(new Uri(QueueEndpoints.HostBase), h =>
            {
                h.Username("guest");
                h.Password("guest");
            });
            cfg.UseLog4Net();
        });