I am runnning Zope-2.7.0/Python-2.3.3/ZEO on Linux and have been having problems with refreshing a Product that I wrote in-house. Upon refreshing, Zope stops responding, and Apache/FastCGI eventually times out waiting for a response. This was also a problem with Zope-2.6.4/ZEO but not Zope-2.4.3/ZEO; but the machines and custom-product code also changed between 2.4.3 and 2.6.4. Following the instructions at: http://www.zope.org/Members/4am/debugspinningzope I was able to learn that the Zope threads look like: (gdb) info threads 6 Thread 40965 (LWP 29363) 0x080d1e77 in visit_decref (op=0x503c1b54, data=0x0) at Modules/gcmodule.c:225 5 Thread 32772 (LWP 29362) 0x42028d69 in sigsuspend () from /lib/i686/libc.so.6 4 Thread 24579 (LWP 29361) 0x42028d69 in sigsuspend () from /lib/i686/libc.so.6 3 Thread 16386 (LWP 29360) 0x42028d69 in sigsuspend () from /lib/i686/libc.so.6 2 Thread 16385 (LWP 29358) 0x420d224b in poll () from /lib/i686/libc.so.6 1 Thread 8192 (LWP 29312) 0x420d3b2e in select () from /lib/i686/libc.so.6 The traceback is at the bottom of this email. Note the mention of the SNPSet Product. This is the product that we wrote and that was refreshed. I was suspicious of the mention of setstate, so I removed the Product's __setstate__ method, but this did not help. Any advice appreciated. Traceback follows: File "/global/nfs-zope/data/Zope-2.7.0/lib/python/ZServer/PubCore/ZServerPublisher.py", line 23, in __init__ response=response) File "/global/nfs-zope/data/Zope-2.7.0/lib/python/ZPublisher/Publish.py", line 372, in publish_module environ, debug, request, response) File "/global/nfs-zope/data/Zope-2.7.0/lib/python/ZPublisher/Publish.py", line 163, in publish_module_standard response = publish(request, module_name, after_list, debug=debug) File "/global/nfs-zope/data/Zope-2.7.0/lib/python/ZPublisher/Publish.py", line 100, in publish request, bind=1) File "/global/nfs-zope/data/Zope-2.7.0/lib/python/ZPublisher/mapply.py", line 88, in mapply if debug is not None: return debug(object,args,context) File "/global/nfs-zope/data/Zope-2.7.0/lib/python/ZPublisher/Publish.py", line 40, in call_object result=apply(object,args) # Type s<cr> to step into published object. File "/global/nfs-zope/data/Zope-2.7.0/lib/python/OFS/DTMLMethod.py", line 130, in __call__ r=apply(HTML.__call__, (self, client, REQUEST), kw) File "/global/nfs-zope/data/Zope-2.7.0/lib/python/DocumentTemplate/DT_String.py", line 474, in __call__ try: result = render_blocks(self._v_blocks, md) File "/global/nfs-zope/data/Zope-2.7.0/lib/python/OFS/DTMLMethod.py", line 123, in __call__ r=apply(HTML.__call__, (self, client, REQUEST), kw) File "/global/nfs-zope/data/Zope-2.7.0/lib/python/DocumentTemplate/DT_String.py", line 474, in __call__ try: result = render_blocks(self._v_blocks, md) File "/global/nfs-zope/data/Zope-2.7.0/lib/python/DocumentTemplate/DT_In.py", line 626, in renderwob sequence=expr(md) File "/global/nfs-zope/data/Zope-2.7.0/lib/python/DocumentTemplate/DT_Util.py", line 201, in eval return eval(code, d) File "<string>", line 1, in <expression> File "/usr/local/zopeinstancehome/Products/SNPSet/SNPSet.py", line 260, in global_gene_list if gene.prettybase_available(): File "/global/nfs-zope/data/Zope-2.7.0/lib/python/ZODB/Connection.py", line 564, in setstate self._set_ghost_state(obj, p) File "/global/nfs-zope/data/Zope-2.7.0/lib/python/ZODB/Connection.py", line 603, in _set_ghost_state state = unpickler.load() File "<string>", line 1, in ?