I think I've tracked it down to a RamCacheManager inside a volitile variable. But I thought volitile variables we'ren't stored? Am I doing something strange with my heirachy that is abusing the ZODB? The heirachy is object.<Map>[Cacheable] And the Cacheable has _v_ZCacheable_cache = RamCacheManager. I believe the RamCacheManager has locks in it.
"Dieter Maurer" <dieter@handshake.de> wrote in message news:17071.4574.893818.528219@gargle.gargle.HOWL...
Dylan Jay wrote at 2005-6-14 17:45 +1000:
... 356, in _commit_objects jar.commit(o, self) File "C:\Program Files\Zope-2.7.5-final\lib\python\ZODB\Connection.py", line 4 52, in commit dump(state) UnpickleableError: Cannot pickle <type 'thread.lock'> objects
I would catch the error and enter a debugger to analyse the "o" above.
With "pdb" (the Python Debugger, part of Python), this could look like:
try: dump(state) except: import pdb; pdb.set_trace()
Good suggestion (I did try to get debugging working in WingIDE and Boa but your way worked best in the end). Unfortunatly I'm still none the wiser. I know which object it is and I've looked at its state (below). I've looked at the OOBTree and made sure it contains nothing that has a lock in it. I can look at sys.exc_info[1].args which is a lock object but what I really need to do is work out where this lock object is and why its entangled with my transaction. Any suggestions?
{'__ac_local_roles__': {'djay': ['Owner']}, '_cacheables': {'constructReviewer': <NamedCacheable instance at 0409A8D0>, 'findNeighbors': <NamedCacheable instance at 0409A8C0>}, '_hasBeenTrained': 0, 'filterByMovies': 0, 'filterByPeople': 0, 'filterByVotes': 0, 'hashMoviesToUse': None, 'hashPeopleToUse': None, 'hoods': <OOBTree object at 0x041B5368>, 'id': 'predictor', 'keepInMemory': 0, 'moviesToUse': None, 'neighborhoodSize': 30, 'overlapPenalty': 50, 'peopleToUse': None, 'reviewers': None, 'title': '', 'votesToUse': None}
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