[Zope] The immortal POSKeyError

[george donnelly]

hi

I found an entire hierarchy had gone POSKeyError on me today, and the
bad folder hierarchy resists deletion. below is a transcript of the
session,

BadFolder is the first inaccessible folder. it has a lot of peer folder
that i don't want to lose.

This is Zope 2.7.0 and Python 2.3.3. The ZODB is about 1.5GB and some
parts of it have been upgraded over time from as early as zope 2.4.x.

fsrecover.py reports zero bytes removed.

Since i can't delete it i am uncertain as to what to try next.

thanks in advance for any suggestions.

zopectl debug
<snip>

>>>
>>> from Zope import app
>>> from ZODB import POSException
>>> from OFS import DTMLMethod
>>> from OFS import Folder
>>> from AccessControl import User
>>> root= app()
>>> obj= root.unrestrictedTraverse('/BTreeFolder/BadFolder')
>>> obj.manage_delObjects('SoleObjectOfBadFolder')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/home/bradc/zope/270/lib/python/ZODB/Connection.py", line 561,
in setstate
    p, serial = self._storage.load(oid, self._version)
  File "/home/bradc/zope/270/lib/python/ZODB/FileStorage.py", line 687,
in load
    return self._load(oid, version, self._index, self._file)
  File "/home/bradc/zope/270/lib/python/ZODB/FileStorage.py", line 655,
in _load
    raise POSKeyError(oid)
ZODB.POSException.POSKeyError: 00000000001ae582
<-->
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