Hi, I'm new to nginx and am trying to use it as a front end web server to a java-based Play framework web app, via reverse proxy. But I'm getting strange timeout behaviour and am not sure how to proceed with debugging.

The full details are at http://groups.google.com/group/play-framework/browse_thread/thread/c853a579d6015d28/e6cf2a53333aa921?lnk=gst&q=nginx#e6cf2a53333aa921

I've been comparing debug-mode access logs for pass and fail cases, but cannot fathom what nginx is doing.

How could I proceed with debugging? I'm working on the assumption that its my system configuration which is causing the problem - I haven't seen any other reference to this kind of problem. I'm running a box with Ubuntu 11.10 x86_64, and nginx was installed from the Ubuntu repo. More than happy to provide logs.