We have implemented a MongoDB based output cache provider for a hybrid ASP.NET web forms / MVC application.

The basic provider was modelled on this https://msdn.microsoft.com/en-us/gg650661.aspx

We modified the code to use the official C# provider (see attached)

Since deployment, we have seen a number of these exceptions:

System.Net.Sockets.SocketException (0x80004005): A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond <IP ADDRESS>>:27017

There are no obvious networking issues in our live environment. The MongoDB server is also currently the ASP.NET session state server.

Any pointers as to how to debug / configuration to check?