ASP.NET Web App freezing on an exception, dw20.exe hanging at 100% CPU

Question

Apologies for the open endedness of this question, but I really don't know what to say.

I've done something to my ASP.NET MVC Web Application to cause an exception which is probably occuring due to an NHibernate mapping error to cause dw20.exe to run at ~ 50% CPU usage (100% on one core). The browser doesn't respond until IIS times out, and the debugger never hits an exception, everything just freezes :s

Anyone got any ideas as to where to start with this?

I'm on windows server 2008, vs2008, .net 3.5

Edit: found a few of these in eventlog

Faulting application w3wp.exe, version 7.0.6001.18000, time stamp 0x47919413, faulting module kernel32.dll, version 6.0.6001.18215, time stamp 0x49953395, exception code 0xe053534f, fault offset 0x000442eb, process id 0x%9, application start time 0x%10.

Thanks

Andrew

Answer 1

Not enough information here to be sure, but I'd try tossing FxCop at the code and see if it picks up anything.

Answer 2

You should take a dump and analyze it with DebugDiag. More details here.