Symptoms
Assume that you use the WCF-SAP adapter send port to send many intermediate documents (IDocs) under heavy load, and the remote SAP server becomes temporarily unreachable. When the connection to the SAP server is restored, the process to send IDocs fails and returns exceptions, such as RfcConcurrentCallException, RfcSerializationException, and RfcCommunicationCanceledException. For example, you might receive an error message that resembles the following message:
SAP.Middleware.Connector.RfcCommunicationCanceledException, sapnco_utils, Version=3.1.0.42, Culture=neutral, PublicKeyToken=50436dca5c7f7d23 client call cancelled before initiating serialization at Microsoft.Adapters.SAP.ExecuteSapOperationsNCo.ExecuteIdocOutbound(String messageAction, Message message, TimeoutHelper timeoutHelper, String TracingEventCode) at Microsoft.Adapters.SAP.SAPOutboundContract.Execute(Message message, TimeSpan timeout) at Microsoft.ServiceModel.Channels.Common.Channels.AdapterRequestChannel.Request(Message message, TimeSpan timeout)
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Resolution
This problem is fixed in the following cumulative update for BizTalk Server:
References
For information about the service packs and cumulative update list for BizTalk Server, see the following article in the Microsoft Knowledge Base:
2555976 Service pack and cumulative update list for BizTalk Server
For more information about BizTalk Server hotfixes, see the following article in the Microsoft Knowledge Base:
2003907Â Information about BizTalk Server hotfixes, cumulative updates, and service packs
