[ZODB-Dev] RE: finding POSKeyErrors

[Gerry Kirk]

> -----Original Message-----
> From: Tim Peters [mailto:tim at zope.com] 
> Sent: November 10, 2004 10:59 AM
> To: 'Gerry Kirk'
> Cc: zodb-dev at zope.org
> Subject: RE: finding POSKeyErrors
> 
> 
> If fsrefs gave a clean report, then you know that the 
> POSKeyError was not due to a missing current revision of a 
> non-versioned object in the database at the time fsrefs ran.  
> Continuing to stare at the database is therefore unlikely to 
> do you any good.
>  
> I don't know what is at fault, but you've pretty well 
> established that the database is not.
> 
Well, my guess is that the actual object is corrupted somehow. I could
run the same catalog query over and over, and the same objects returned
the POSKeyError with a getObject() call.

> For example, do you know that 2.7.2 Zope can create 
> POSKeyErrors "out of thin air"?  See ZODB news for ZODB 3.2.4 
> release candidate 1:
> 

Ok, I'll try upgrading. I'm still leery about the repeatable
POSKeyErrors, though. I thought maybe they occurred when we had issues
with bad memory, so I just want to clean up any such bad objects. Guess
I'm not totally convinced there aren't 'bad' objects in the system -
ZODB is still a black box to me.

Regards,
Gerry