[Zope] ftp server deadlocking zope with DeadlockDebugger

[Michael Kaplan]

Hello,

about 2 weeks ago I reported about my ftp-problem
(see attached listing).

In the meantime I installed DeadlockDebugger-1.0.tgz
from http://www.zope.org/Members/nuxeo/Products/DeadlockDebugger

Here is the output of this program for the thread that seems 
to be responsible for the deadlock. This happens when I open
a ftp connection to the server, cd to a directory and launch
the 'ls'-command: 

Thread 11 (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 140, in getTranslation
    return l and l[0] or l
  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 232, in getCanonical
    return ret
  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 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?

Thanks, Michael

> I have a problem with the Medusa FTP server deadlocking Zope completely.
>
> I'm using Zope 2.8.5-final, python 2.3.5, sunos5 with standard port
> settings and port-base 1500, e.g.
> 
> ZServer.HTTPServer.zhttp_server (Port: 9580)
> ZServer.FTPServer.FTPServer (Port: 9521)
> 
> I can connect to the ftp server

>> ftp localhost 9521
>  
>
> Connected to localhost.
> 220  FTP server (Medusa Async V24763 [experimental]) ready.
> Name (localhost:root): *******
> 331 Password required.
> Password: ******
> 230 Login successful.
> ftp> cd dir
> 250 CWD command successful.
> 
> The standard ftp commands *cd*, *lcd*, *put* and *get* work fine.
>  
> But if I try to use *ls*, *dir* or *mkdir* Zope seems to arrive in an
> infinite loop blocks one cpu completely and has to be restarted.