Hello, We have been experiencing some ConnectionStateError in a Zope 2 based application. Looking for info on the web makes me almost 100% sure that we have a bug in our application layer. I understand that I should look for persistent objects stored in module or class level variables (which imply shared by threads and thus connections). Do not hesitate to tell me if this is a wrong explanation of the potential cause of ConnectionStateError. However, I wonder if some of you could give debugging techniques outside reviewing the code. I also wonder what was the reason to deprecate ``zope.thread``. I see it was used by ``zope.component`` to hold thread-safe siteinfo. Could a too frequent usage of getSite lead to ConnectionStateError ? I think that it is not the case but I prefer to ask. Thanks -- Godefroid Chapelle (aka __gotcha) http://bubblenet.be