title: masstransit with rabbitmq: Why message auto moved to ***_skipped queue when it responing
body: <p><strong>UCITY.API request to UCITY.USER's "ucity_us_mobilephonecomplete" queue and receive message but Masstransit auto move it to the skip queue</strong> </p>
  
  <p>but other queues are working successfully</p>
  
  <p><strong>Masstransit Trace Log：</strong></p>
  
  <pre><code>2018-03-23 15:59:22.5727|DEBUG|MassTransit.Messages|SEND rabbitmq://192.168.1.142/us/ucity_us_mobilephonecomplete 0b350000-dafb-1866-5b48-08d59093fd36 MQNamespace.USER.IMobilephoneCompleteRequest
  
  2018-03-23 15:59:22.6077|DEBUG|MassTransit.Messages|SKIP rabbitmq://192.168.1.142/us/bus-WIN-VH8418VRIC5-UCITY.API-bc4oyyg49ccgcqg6bdk3br7trf?durable=false&amp;autodelete=true N/A
  </code></pre>
  
  <p><strong>Message Detail</strong> </p>
  
  <p>he server reported 1 messages remaining.</p>
  
  <pre><code>Exchange    bus-WIN-VH8418VRIC5-UCITY.API-bc4oyyg49ccgcqg6bdk3br7trf_skipped
  Routing Key 
  Redelivered ●
  Properties  
  message_id: 0b350000-dafb-1866-d0af-08d59093bae2
  delivery_mode:  2
  headers:    
  Content-Type:   application/vnd.masstransit+json
  publishId:  1
  MT-Reason:  dead-letter
  MT-Host-MachineName:    WIN-VH8418VRIC5
  MT-Host-ProcessName:    UCITY.API
  MT-Host-ProcessId:  14648
  MT-Host-Assembly:   UCITY.API
  MT-Host-AssemblyVersion:    1.0.0.0
  MT-Host-MassTransitVersion: 4.0.1.1390
  MT-Host-FrameworkVersion:   4.0.30319.42000
  MT-Host-OperatingSystemVersion: Microsoft Windows NT 6.2.9200.0
  content_type:   application/vnd.masstransit+json
  Payload
  1060 bytes
  Encoding: string
  {
  
      "messageId": "0b350000-dafb-1866-d0af-08d59093bae2",
  
      "requestId": "0b350000-dafb-1866-8267-08d59093bade",
  
      "conversationId": "0b350000-dafb-1866-0ddf-08d59093bae2",
  
      "sourceAddress": "rabbitmq://192.168.1.142/us/ucity_us_mobilephonecomplete",
  
      "destinationAddress": "rabbitmq://192.168.1.142/us/bus-WIN-VH8418VRIC5-UCITY.API-bc4oyyg49ccgcqg6bdk3br7trf?durable=false&amp;autodelete=true",
  
      "messageType": [
  
          "urn:message:MQNamespace:IBaseResponseModel"
  
      ],
  
      "message": {
  
          "code": 4212,
  
          "correlationId": "73989f86-51fd-4ae1-a467-a556a165f125",
  
          "message": "COMPLETEMOBILEPHONE FAILD!USERWECHAT MOBILEPHONE COMPLETED",
  
          "timeStamp": "2018-03-23T15:57:31.3218406+08:00"
  
      },
  
      "headers": {},
  
      "host": {
  
          "machineName": "WIN-VH8418VRIC5",
  
          "processName": "UCITY.USER",
  
          "processId": 8952,
  
          "assembly": "UCITY.USER",
  
          "assemblyVersion": "1.0.0.0",
  
          "frameworkVersion": "4.0.30319.42000",
  
          "massTransitVersion": "4.0.1.1390",
  
          "operatingSystemVersion": "Microsoft Windows NT 6.2.9200.0"
      }
  }
  </code></pre>
  
  <p>the skipped queue what does it do 
  thanks for answer</p>