Re: Upgrade (to 0.9.2) fails with _p_jar

Benno Luthiger wrote:
> Dear list members
> 
> I'm testing our upgrade procedure, which integrates all steps from Silva
> 0.9.1 to 1.0, with different sites.
> The upgrade of a big site fails in the first step (to Silva 0.9.2) with the
> following error:
> AttributeError: _p_jar
> 
> The relevant stack trace is:
>   File "/opt/ZOPE/ZOPESITES/UPGRADE/TEST_IDSITES/Products/Silva/upgrade.py",
> line 305, in upgrade_using_registry
>     if obj._p_jar is not None:
> 
> The object the failure happens is:
> .../silva_ethz/ETH/id_sites/wcms/wcms/people/olafa/index/0/child%2C0%2C9
> That seems to be a node in the version 0, i.e. a ParsedXML object.
> 
> Any ideas?

I indeed do recognize this attribute error when working on the upgrade 
procedures. I also remember having to add an getattr check for this 
_p_jar here and there (in code which might touch ParsedXML objects).

AFAIK (it is all a bit fuzzy to me too) the _p_jar attributes are part 
of the persistence machinery of Zope/ZODB. Sometimes objects do not 
(yet) have this attr. depending on the state of the transaction at 
that point.


Uhm, I'd need a bit more investigation time into the code you mention 
in the stack trace to have a reasonable suggestion. For the time being 
you might just change this line 305 into something like:

   if getattr(obj, '_p_jar', None) and obj._p_jar is not None:

...and see if the upgrade now continues succesfully.


HTH
regards
jw

-- 
Jan-Wijbrand Kolman
[email protected]