Receiving the following exception while communicating with a WCF service.
CommunicationException: The underlying connection was closed: A connection that was expected to be kept alive was closed by the server.
The error doesn't not occur with every call and the WCF service is hosted in a pool of several servers. I don't know how many because I don't know the service.
I have located the following article on MSDN that states that many times this error is caused by the service and is not really an exception involving the network transmission of the message.
http://msdn.microsoft.com/en-us/library/ms734691(v=vs.100).aspx
Is there a specific network configuration that would cause this timeout to occur... for instance a connection pool idle timeout of 100 seconds, a server keep-alive of 120 seconds and a network router between the server and the client with an idle timeout of 60 seconds.
The binding configuration that is being used is very simple... BasicHttpBinding configured with the following
valuescloseTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:03:00" sendTimeout="00:03:00" allowCookies="false" bypassProxyOnLocal="false" hostNameComparisonMode="StrongWildcard" maxBufferSize="2147483647" maxBufferPoolSize="524288" maxReceivedMessageSize="2147483647" messageEncoding="Text" textEncoding="utf-8" transferMode="Buffered" useDefaultWebProxy="true"
