Failed to establish a backside connection - wcf

Question

When my ASP.NET WCF service calls another ASP.NET WCF service the following is returned:
Failed to establish a backside connection
Server stack trace:
at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)
Exception rethrown at [0]:
at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
at ServiceNameSpace.Service.ServiceType.getStatus(getStatusRequest request)
Any ideas?
Update 10:12 AM - After looking at this for a while: my guess is the other service doesn't like some of the data we pass to it. I think it's not validating inputs and then throws an exception on a null reference or perhaps a DB query.
PS. Names of components in the last stack trace line changed for security\privacy reasons.
PS. I tried to do a search. I pasted my title into the search box and then clicked on search to the left of the input box. Nothing happened.

Answer 1

I would search the source code of the calling wcf service for the term Failed to establish a backside connection.
I am fairly certain there is no built-in exception message in the WCF stack with that exact terminology.
Once you have found the code which throws the exception then you will be step closer to solving the problem ;)