NHibernate exception: Transaction not connected, or was disconnected

Question

In our develop environment all the ASP.NET application works just fine. However, when I deploy the site on the test machine, on some pages I get this exception:

Answer 1

There's a problem with your session-per-request pattern implementation. ASP.NET is multi-threaded and the session is being closed when a thread terminates instead of when the request ends. There are many examples of how to manage session-per-request and NHibernate has a built in NHibernate.Context.WebSessionContext but I prefer to use a dependency injection framework such as Ninject.