[Zope] recover from POSKeyError after corruption by pack()ing bug

[Jake]

I have had this problem and worked through it, through a ton of trial and
error.

Basically, using all the tricks with that Zope labs how-to and with
fsrecover I found that there was a bad object. Once I deleted that object
the errors went away.

I am sorry there is not a lot of help on this one, it is just a strange
problem.

Jake


-- 
http://www.ZopeZone.com


Dominik Schäfer said:
> Hi!
>
> I have a serious problem: I think about a week ago my database was damaged
> by this nasty pack()ing bug. Unfortunately this error was not noticeable
> until my zope restart yesterday. :-(
> The consequence is a POSKeyError (POSKeyError: 0000000000000009) which
> prevents zope from starting.
> I tried to repair the database with fsrecover.py (from zope-2.6.3 and
> zope-2.6.4rc1), and it deleted some invalid transactions but it did not
> solve the problem.
> Then I tried the instructions on
> http://www.zopelabs.com/cookbook/1054240694, but had no success at all
> because I got again a POSKeyError. *g*
> I used fsrefs.py on the Data.fs and the first 2 error it found was:
> --- cut here ---
> oid 0x4 AccessControl.User.UserFolder
> last updated: 2004-01-16 14:08:02.781121, tid=0x3526BB00BDDB9CCL
> refers to invalid object:
>         oid 0x9 missing: 'Persistence.PersistentMapping'
>
> oid 0xf17 AccessControl.User.UserFolder
> last updated: 2004-01-16 14:08:14.036884, tid=0x3526BB03BE40544L
> refers to invalid object:
>         oid 0x1162 missing: 'Persistence.PersistentMapping'
> --- cut here ---
> After these 2 errors follow about 24Kb of errors or references to missing
> objects or objects that could not be loaded. It seems to me, that some
> very basic objects were destroyed a week ago.
> Of course all backups during the last week contain the damaged
> database. :-( It is really a pity, that the consequences of this database
> damage shows not up until the next zope restart...
> Is there any possibility to recover the database or to "extract" the
> transactions of the last 8 days and to prevent the complete loss of data
> in that time? Has anybody an idea, which I could try?
>
> Bye,
> Dominik
>
> P.S. I hope I got the suitable mailing list, I was uncertain if
> zope.general or zope.zobd fits better...
>
>
>
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