gistfile1.txt

A Message gets handled through NSB and the following code is run:

public void Handle(UpdateProductData message)
{
    var product = session.Get<Product>(message.ProductDto.Id);
    product.Name = message.ProductDto.Name;
    product.PartNumber = message.ProductDto.PartNumber;
    product.Price = message.ProductDto.Price;
    session.Update(product);
    Logger.InfoFormat("Updated Product {0}", product.Id);
}

While looking at NHProf I always see the SELECT being run, but only once every 3 sessions or so I get the UPDATE too (always changing data of course, so the object should be dirty).

Because of NServiceBus the whole method is wrapped in a distributed transaction with isolation level: Serializable and is always committed after the handler is run (checked this with NHprof)

I looked at the ISession.IsDirty() and it's consistent with issuing the UPDATE, just totally wrong because whenever I ran that method something had changed so the session should have been dirty.