Symptoms
Assume that you have Microsoft BizTalk Server 2013 and Microsoft BizTalk Enterprise Service Bus (ESB) Toolkit 2.2 installed. When you try to browse Windows Communication Foundation (WCF) services from ESB, you receive the following error message:
An ExceptionDetail, likely created by IncludeExceptionDetailInFaults=true, whose value is:System.ArgumentException: The value could not be added to the collection, as the collection already contains an item of the same type: 'Microsoft.Practices.ESB.ServiceModel.Helpers.SoapHeaderMetadataBehavior'. This collection only supports one instance of each type.Parameter name: itemat System.ServiceModel.Description.ServiceMetadataBehavior.MetadataExtensionInitializer.GenerateMetadata()at System.ServiceModel.Description.ServiceMetadataExtension.EnsureInitialized()at System.ServiceModel.Description.ServiceMetadataExtension.HttpGetImpl.InitializationData.InitializeFrom(ServiceMetadataExtension extension)at System.ServiceModel.Description.ServiceMetadataExtension.HttpGetImpl.GetInitData()at System.ServiceModel.Description.ServiceMetadataExtension.HttpGetImpl.TryHandleDocumentationRequest(Message httpGetRequest, String[] queries, essage& replyMessage)at System.ServiceModel.Description.ServiceMetadataExtension.HttpGetImpl.ProcessHttpRequest(Message httpGetRequest)at SyncInvokeGet(Object , Object[] , Object[] )at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs)at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc)at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc)at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage31(MessageRpc& rpc)
Resolution
Cumulative update information
For BizTalk Server 2013
The hotfix that resolves this issue is included in cumulative update package 2 for BizTalk Server 2013. For more information about how to obtain the cumulative update package, click the following article number to view the article in the Microsoft Knowledge Base:
2892599 Cumulative update package 2 for BizTalk Server 2013
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
