Symptoms
Consider the following scenario:
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You are using a BizTalk Server WCF adapter in a solicit-response send port in Microsoft BizTalk Server 2010 Cumulative Update 6 (CU6).
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You configure the Body Path expression as Xpath in the Inbound BizTalk message body section on Messages tab for the WCF send port.
In this scenario, you may experience one of the following issues:
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Deserialization produces random and irregular errors that seem to be caused by the stream position jumping to the wrong location.
In this situation, you receive an error message that resembles the following:System.Xml.XmlException: Start element 'To s:mustUndersta' does not match end element 'sendMessageResult'. Line 1, position 951.
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The WCF adapter returns the wrong mismatched response back to the pipeline.
In this situation, there may be no error but the subscriber for the response will get the wrong message back.
Resolution
Cumulative update information
This issue was first fixed in the following cumulative update of BizTalk Server:
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
For information about the service packs and cumulative update list for BizTalk Server, see KB 2555976: Service pack and cumulative update list for BizTalk Server.
For more information about BizTalk Server hotfixes, see KB 2003907: Information about BizTalk hotfixes and Service Pack support.
