MassTransit 3.1 订阅开始，遇到 "Duplicate type name within an assembly"

Question

我使用位于以下位置的示例实施了 MassTransit 解决方案： http://looselycoupledlabs.com/2014/06/masstransit-publish-subscribe-example/

当发布者和订阅者都是运行时，一切正常。

当我停止订阅者并发布更多消息时，我在 RabbitMQ 的 MtPubSubExample_TestSubscriber 队列中看到了预期的就绪状态消息数。

当我重新启动时，订阅者启动它的总线并且只接收队列中的一条消息。剩余的消息被移动到 MtPubSubExample_TestSubscriber_error 队列。如果我将消息铲到原始 MtPubSubExample_TestSubriber 队列，运行订阅者会毫无问题地接收消息。这似乎是只在启动时出现的问题。

当我是运行 MassTransit 2.x 版本（和相关代码）时，这个问题不存在。当我升级到 MassTransit 3.1 时才出现这个问题。

我正在使用以下内容：轨道交通 3.1.0 版二郎 OTP 18 (7.2.1) RabbitMQ 服务器版本 3.5.7

当我从错误队列中收到一条消息时，它具有以下详细信息：

交换: MtPubSubExample_TestSubscriber_error

路由键:

重新投递：○

属性：

message_id: 93f80000-b49a-a088-72a7-08d307cc086b
delivery_mode:  2
headers:           Content-Type: application/vnd.masstransit+json
                      MT-Reason: fault
               MT-Fault-Message: Duplicate type name within an assembly.
             MT-Fault-Timestamp: 2015-12-18T16:55:40.9748103Z
            MT-Fault-StackTrace: at System.Reflection.Emit.ModuleBuilder.CheckTypeNameConflict(String strTypeName, Type enclosingType) 
                                 at System.Reflection.Emit.AssemblyBuilderData.CheckTypeNameConflict(String strTypeName, TypeBuilder enclosingType) 
                                 at System.Reflection.Emit.TypeBuilder.Init(String fullname, TypeAttributes attr, Type parent, Type[] interfaces, ModuleBuilder module, PackingSize iPackingSize, Int32 iTypeSize, TypeBuilder enclosingType) 
                                 at System.Reflection.Emit.ModuleBuilder.DefineType(String name, TypeAttributes attr, Type parent, Type[] interfaces) 
                                 at MassTransit.Internals.Reflection.DynamicImplementationBuilder.CreateTypeFromInterface(ModuleBuilder builder, Type interfaceType)
            MT-Host-MachineName: MACHINE1
            MT-Host-ProcessName: LearningMT.TestSubscriber.vshost
              MT-Host-ProcessId: 12700
               MT-Host-Assembly: LearningMT.TestSubscriber
        MT-Host-AssemblyVersion: 1.0.0.0
     MT-Host-MassTransitVersion: 3.1.0.367
       MT-Host-FrameworkVersion: 4.0.30319.42000
 MT-Host-OperatingSystemVersion: Microsoft Windows NT 6.1.7601 Service Pack 1
content_type: application/vnd.masstransit+json

有效载荷 983 字节编码：字符串

{
  "messageId": "93f80000-b49a-a088-72a7-08d307cc086b",
  "conversationId": "93f80000-b49a-a088-7353-08d307cc086b",
  "sourceAddress": "rabbitmq://localhost:5672/bus-MACHINE1-LearningMT.TestPublisher.vshost-1xhyyyfwukoeogj1bdjox19zrq?durable=false&autodelete=true&prefetch=16",
  "destinationAddress": "rabbitmq://localhost:5672/LearningMT.MessageContracts:ISomethingHappenedMessage",
  "messageType": [
    "urn:message:LearningMT.MessageContracts:ISomethingHappenedMessage"
  ],
  "message": {
    "what": "Fifth",
    "when": "2015-12-18T16:55:28.5292293Z"
  },
  "headers": {},
  "host": {
    "machineName": "MACHINE1",
    "processName": "LearningMT.TestPublisher.vshost",
    "processId": 18992,
    "assembly": "LearningMT.TestPublisher",
    "assemblyVersion": "1.0.0.0",
    "frameworkVersion": "4.0.30319.42000",
    "massTransitVersion": "3.1.0.367",
    "operatingSystemVersion": "Microsoft Windows NT 6.1.7601 Service Pack 1"
  }
}

有没有人见过订阅者启动时从队列中下拉时出现 "Duplicate type name within an assembly" 的问题？

Answer 1

这是在今天早些时候发布的 v3.1.1 中报告并修复的。

MassTransit 3.1 订阅开始，遇到 "Duplicate type name within an assembly"

MassTransit 3.1 on subscribe start, encountering "Duplicate type name within an assembly"

masstransit