Fired up 2.1.6 with default threads. (This particular installation used to crash at least once a day until I set single threaded mode) Assaulted it using this example code for 15 minutes or so with multiple IE5 clients behaving as badly as I could make them - no sign of core dump or a restart.....not sure if this is helpful or not. I didn't try multiple ip addresses for all the clients - all were on my workstation. I think it was worth the effort even though it didn't break anything - one thing we really need is a reproducible way to make this problem appear. As Amos has said, the problem may lie deep in the bowels of the applications running on top of zserver. Given that there was mention that freebsd installations seemed immune, we have the the Linux thread libraries to content with as well as all the zope code running at crash prone sites..anyone got this happening with an old linux install? I only have access to redhat 6.1 I've added a comment to Marcus's wiki page for collecting data on this problem - suggest anyone else with the problem does the same...http://www.zope.org/Members/tseaver/Projects/HighlyAvailableZope/DiagnosingH... Sigh. Back to single thread. Gak. Tres Seaver wrote

I have a couple of testcases for this problem. (Un)fortunately, I don't use IE5 (and don't go with girls who do! :), and therefore they all work without a hitch.

First, an ExternalMethod, implemented so::

-- Dr Ross Lazarus Associate Professor and Sub-Dean for Information Technology Faculty of Medicine, Room 126A, A27, University of Sydney, Camperdown, NSW 2006, Australia Tel: (+61 2) 93514429 Mobile: +61414872482 Fax: (+61 2) 93516646 Email: rossl@med.usyd.edu.au