http://www.zopelabs.com/cookbook/1073504990 In addition to the information on this page I have found that you can also run the following command at a (gdb) prompt to get a list of URLs being processed by the misbehaving thread: call PyRun_SimpleString("import string,sys,os,ZServer; sys.stdout=open('/tmp/urls','w',0); print string.join(map(lambda a:str(getattr(a,'env',{}).get('PATH_INFO','')), sys.modules['asyncore'].socket_map.values()), '\\n')") It's doing a bunch of stuff to try to format the file nicely into a file /tmp/urls, it can probably be simplified. There may also be an altogether better way of approaching it. Just thought I'd throw this in. And looking at it, I'm not sure that you need to import ZServer or os, I came up with this and didn't really refine it once it worked. -- Brian Brinegar Web Systems Developer Engineering Computer Network