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Hibernate version:
3.0 final

Mapping documents:
Lots of...

Problem:
Hibernate 2.1.8 worked fine and loaded my mappings in about 2 seconds. There are 127 of these in separate files, BTW.

Now I upgrade to hibernate 3 and each mapping takes a second or so to load, the whole thing takes 2 minutes or more to start up.

The crazy thing is, the processor is idling the whole time. The process is a normal priority and there is no iowait showing up either, the machine is just idling. It's like the thread is sleeping or blocking for some reason but I have no idea what.

Does anyone have any ideas how I can track down this problem?

I have tried stripping down the application so all it does is:

Configuration cfg = new Configuration ()
.addResource ("mapping1.hbm.xml")
.addResource ("mapping2.hbm.xml")
// etc
.addResource ("mapping100.hbm.xml");
SessionFactory sf = cfg.buildSessionFactory ();

And it is still going slowly.

I have tried running it on a different machine with a very different environment and it still does it.

Both machines are running Sun's latest JVM.

Ok I've just solved this seconds after posting... ;-)

It's looking on the net for the 2.0 DTD I think, not exactly sure but it's something like that.

yes - remember to read the migration guide for H2 to H3 (available on hibernate.org doc page)