This is a pretty awesome video tip from Joe Walker of DWR fame showing how to upload files using DWR.Next.

So I was testing out a huge portion of code involving DWR and hibernate and I encountered massive slowdowns. Log files generated massive amounts of LazyInitializationException errors. Turned out that DWR attempted to convert hibernate objects, invoking all the lazy-loaded child objects along the way. The solution? Specify the converter in WEB-INF/dwr.xml as "hibernate".


This will tell DWR to skip all lazy-loaded children for hibernate. Of course you'll have to explicitly join children you need but its way easier to manage, IMO.