Dieter Maurer wrote:

Michael Kaplan wrote at 2006-5-5 16:09 +0200:
...
File "/home/www/Zope-2.8.5-0/Products/Archetypes/ReferenceEngine.py", line 583, 
in getReferences
  return self._resolveBrains(brains)
File "/home/www/Zope-2.8.5-0/Products/Archetypes/ReferenceEngine.py", line 716, 
in _uidFor
  return uuid, obj
File "/home/www/Zope-2.8.5-0/Products/Archetypes/ReferenceEngine.py", line 634, 
in isReferenceable
  return (IReferenceable.isImplementedBy(object) or
File 
"/usr/local/mypackages/Zope-2.8.5-final/lib/python/Interface/_InterfaceClass.py",
 line 111, in isImplementedBy
  return visitImplements(
File 
"/usr/local/mypackages/Zope-2.8.5-final/lib/python/Interface/Implements.py", 
line 86, in visitImplements
  return r
File 
"/usr/local/mypackages/Zope-2.8.5-final/lib/python/Interface/Implements.py", 
line 86, in visitImplements
  return r
File 
"/usr/local/mypackages/Zope-2.8.5-final/lib/python/Interface/Implements.py", 
line 86, in visitImplements
  return r
File 
"/usr/local/mypackages/Zope-2.8.5-final/lib/python/Interface/Implements.py", 
line 81, in visitImplements
  elif implements_class == TupleType or type(implements) is TupleType:

Could anybody explain what's wrong here and how to repair it?

Stays the part above (maybe partially) accross several
"DeadlockDebugger" invocations (or changes the tail of your
traceback continously)?

In this case, there would seem to be some infinite loop caused
by the AT "ReferenceEngine" (I like it).

As you supposed the tail changes if I invoke DeadlockDebugger several times.
Here are 3 more examples besides the one I sent before:

Thread 10 (GET /dirname/manage_FTPlist):
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/ZServer/PubCore/ZServerPublisher.py", line 23, in __init__
   response=response)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/ZPublisher/Publish.py", line 386, in publish_module
   environ, debug, request, response)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/ZPublisher/Publish.py", line 187, in publish_module_standard
   response = publish(request, module_name, after_list, debug=debug)
File "/home/www/Zope-2.8.5-0/Products/PlacelessTranslationService/PatchStringIO.py", line 51, in new_publish
   x = Publish.old_publish(request, module_name, after_list, debug)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/ZPublisher/Publish.py", line 104, in publish
   object=request.traverse(path, validated_hook=validated_hook)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/ZPublisher/BaseRequest.py", line 272, in traverse
   bpth(object, self)
File "/home/www/Zope-2.8.5-0/Products/LinguaPlone/I18NBaseObject.py", line 421, in __before_publishing_traverse__
   stack.append('not_available_lang')
File "/home/www/Zope-2.8.5-0/Products/LinguaPlone/I18NBaseObject.py", line 150, in getTranslationLanguages
   return self.getTranslations().keys()
File "/home/www/Zope-2.8.5-0/Products/LinguaPlone/I18NBaseObject.py", line 176, in getTranslations
   return self.getCanonical().getTranslations()
File "/home/www/Zope-2.8.5-0/Products/LinguaPlone/I18NBaseObject.py", line 196, in isCanonical
   return not bool(self.getReferenceImpl(config.RELATIONSHIP))
File "/home/www/Zope-2.8.5-0/Products/Archetypes/Referenceable.py", line 105, in getReferenceImpl
   return refs
File "/home/www/Zope-2.8.5-0/Products/Archetypes/ReferenceEngine.py", line 577, in getReferences
   if targetObject:


Thread 10 (GET /dirname/manage_FTPlist):
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/ZServer/PubCore/ZServerPublisher.py", line 23, in __init__
   response=response)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/ZPublisher/Publish.py", line 386, in publish_module
   environ, debug, request, response)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/ZPublisher/Publish.py", line 187, in publish_module_standard
   response = publish(request, module_name, after_list, debug=debug)
File "/home/www/Zope-2.8.5-0/Products/PlacelessTranslationService/PatchStringIO.py", line 51, in new_publish
   x = Publish.old_publish(request, module_name, after_list, debug)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/ZPublisher/Publish.py", line 104, in publish
   object=request.traverse(path, validated_hook=validated_hook)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/ZPublisher/BaseRequest.py", line 272, in traverse
   bpth(object, self)
File "/home/www/Zope-2.8.5-0/Products/LinguaPlone/I18NBaseObject.py", line 421, in __before_publishing_traverse__
   stack.append('not_available_lang')
File "/home/www/Zope-2.8.5-0/Products/LinguaPlone/I18NBaseObject.py", line 150, in getTranslationLanguages
   return self.getTranslations().keys()
File "/home/www/Zope-2.8.5-0/Products/LinguaPlone/I18NBaseObject.py", line 176, in getTranslations
   return self.getCanonical().getTranslations()
File "/home/www/Zope-2.8.5-0/Products/LinguaPlone/I18NBaseObject.py", line 174, in getTranslations
   return result
File "/home/www/Zope-2.8.5-0/Products/Archetypes/Referenceable.py", line 93, in getBRefs
   return [ref.getSourceObject() for ref in refs]
File "/home/www/Zope-2.8.5-0/Products/Archetypes/ReferenceEngine.py", line 595, in getBackReferences
   return self._resolveBrains(brains)
File "/home/www/Zope-2.8.5-0/Products/Archetypes/ReferenceEngine.py", line 690, in _queryFor
   return brains
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/Products/ZCatalog/ZCatalog.py", line 690, in searchResults
   return self._catalog.searchResults(REQUEST, used, **kw)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/Products/ZCatalog/Catalog.py", line 733, in searchResults
   return self.search(args, sort_index, reverse, sort_limit, _merge)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/Products/ZCatalog/Catalog.py", line 533, in search
   return LazyMap(self.__getitem__, rs, len(rs))
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/Products/PluginIndexes/common/UnIndex.py", line 347, in _apply_index
   if record.keys==None: return None
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/Products/PluginIndexes/common/util.py", line 70, in __init__
   return
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/Products/ZCatalog/Catalog.py", line 771, in has_key
   except KeyError:


Thread 10 (GET /dirname/manage_FTPlist):
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/ZServer/PubCore/ZServerPublisher.py", line 23, in __init__
   response=response)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/ZPublisher/Publish.py", line 386, in publish_module
   environ, debug, request, response)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/ZPublisher/Publish.py", line 187, in publish_module_standard
   response = publish(request, module_name, after_list, debug=debug)
File "/home/www/Zope-2.8.5-0/Products/PlacelessTranslationService/PatchStringIO.py", line 51, in new_publish
   x = Publish.old_publish(request, module_name, after_list, debug)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/ZPublisher/Publish.py", line 104, in publish
   object=request.traverse(path, validated_hook=validated_hook)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/ZPublisher/BaseRequest.py", line 272, in traverse
   bpth(object, self)
File "/home/www/Zope-2.8.5-0/Products/LinguaPlone/I18NBaseObject.py", line 413, in __before_publishing_traverse__
   translation = self.getTranslation(cookie_lang)
File "/home/www/Zope-2.8.5-0/Products/LinguaPlone/I18NBaseObject.py", line 139, in getTranslation
   l = self.getTranslations().get(language, None)
File "/home/www/Zope-2.8.5-0/Products/LinguaPlone/I18NBaseObject.py", line 176, in getTranslations
   return self.getCanonical().getTranslations()
File "/home/www/Zope-2.8.5-0/Products/LinguaPlone/I18NBaseObject.py", line 168, in getTranslations
   for obj in self.getBRefs(config.RELATIONSHIP):
File "/home/www/Zope-2.8.5-0/Products/Archetypes/Referenceable.py", line 91, in getBRefs refs = tool.getBackReferences(self, relationship, targetObject=targetObject) File "/home/www/Zope-2.8.5-0/Products/Archetypes/ReferenceEngine.py", line 594, in getBackReferences
   brains = self._queryFor(tid=sID, relationship=relationship, sid=tID)
File "/home/www/Zope-2.8.5-0/Products/Archetypes/ReferenceEngine.py", line 688, in _queryFor
   brains = self.searchResults(query, merge=merge)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/Products/ZCatalog/ZCatalog.py", line 690, in searchResults
   return self._catalog.searchResults(REQUEST, used, **kw)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/Products/ZCatalog/Catalog.py", line 733, in searchResults
   return self.search(args, sort_index, reverse, sort_limit, _merge)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/Products/ZCatalog/Catalog.py", line 476, in search
   r = _apply_index(request)
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/Products/PluginIndexes/common/UnIndex.py", line 372, in _apply_index
   if record.get('usage',None):
File "/usr/local/mypackages/Zope-2.8.5-final/lib/python/Products/PluginIndexes/common/util.py", line 133, in get
   def get(self,k,default_v=None):

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