[Jim Rippon] > ... > ------ 2005-11-07T15:03:51 ERROR(200) ZODB Couldn't load state for 0x1655 > Traceback (most recent call last): > File "/data/newsite/lib/python/ZODB/Connection.py", line 600, in setstate > self._set_ghost_state(obj, p) > File "/data/newsite/lib/python/ZODB/Connection.py", line 639, in set_ghost_state > state = unpickler.load() > EOFError
The pickle for the object with oid 0x1655 is corrupt. Here's an _example_ of the kind of pickle damage that could cause that: >>> import cPickle >>> from cStringIO import StringIO Create a pickle (serialized string form) of list [1,2,3,4]: >>> p = cPickle.dumps([1, 2, 3, 4], 1) >>> p ']q\x01(K\x01K\x02K\x03K\x04e.' Load the pickle; this should work fine: >>> f = StringIO(p) >>> u = cPickle.Unpickler(f) >>> u.load() [1, 2, 3, 4] And it did work fine. Now replace the pickle's last byte with a NUL byte (chr(0)) and try again: >>> p = p[:-1] + '\x00' >>> p ']q\x01(K\x01K\x02K\x03K\x04e\x00' >>> f = StringIO(p) >>> u = cPickle.Unpickler(f) >>> u.load() Traceback (most recent call last): File "<stdin>", line 1, in ? EOFError The unpickler complained because it hit the end of the pickle string while it was still looking for "meaningful" bytes. Now we don't know what oid 0x1655 _is_ in your app, neither how badly the pickle is damaged, nor how widespread corruption may be. This is low-level corruption, and it's rarely obvious what to do in such cases. As you discovered, fsrecover can't help (fsrecover doesn't know anything about object pickles; it works at a level even lower than that). Possibilities at this point include: - Revert to using a recent backup. - Figure out what oid 0x1655 "means" and repair the problem based on your knowledge of your site and of the semantic role 0x1655 plays in your site. fsdump.py may help. - Analyze oid 0x1655's pickle string (the `p` argument passed to `_set_ghost_state` in your traceback), hoping that the damage is small and obvious (for example, in the case I concocted above, the damaged pickle ends with chr(0) instead of with '.', and that's easy enough for a pickle expert to spot and to fix -- although do note it's unlikely your damage is that simple). _______________________________________________ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org http://mail.zope.org/mailman/listinfo/zodb-dev
