[ZODB-Dev] UnpicklingError in Ape 1.0

[Tim Peters]

Dtvie, if you don't get a useful response from this (zodb-dev) list, you may
have better luck on the zope-db list:

    http://mail.zope.org/mailman/listinfo/zope-db

APE and MySQL are discussed more often there.

[Dinh Trung Viet]
> I had a problem when trying to use Ape 1.0 in Zope 2.7 to store data in
> MySQL database. I cannot add objects into the mount point portion
> (default is '/sql'). Here is the trace back I found in log file:
>
> 2005-04-06T15:12:01 INFO(0) ZODB conflict error at
/sql/manage_addProduct/OFSP/manage_addImage (1 conflicts since startup at
2005-04-06T15:08:45)
> ------ 2005-04-06T15:12:02 ERROR(200) ZODB Couldn't load state for '5'
> Traceback (most recent call last):
>   File "C:\TestSites\APE\Products\Ape\lib\apelib\zodb3\connection.py",
line 359, in setstate
>     event = osio.deserialize(oid, obj, classification, state)
>   File "C:\TestSites\APE\Products\Ape\lib\apelib\core\io.py", line 160, in
deserialize
>     mapper.serializer.deserialize(event, state)
>   File "C:\TestSites\APE\Products\Ape\lib\apelib\core\serializers.py",
line 121, in deserialize
>     s.deserialize(event, state)
>   File "C:\TestSites\APE\Products\Ape\lib\apelib\zodb3\serializers.py",
line 291, in deserialize
>     s = u.load()
> UnpicklingError: unpickling stack underflow
>
> I have no idea why. Everything works fine with filesystem storage. Could
> anyone help?!
>
> Thanks, Dtvie