From vincent at nexedi.com  Thu May 26 00:58:21 2011
From: vincent at nexedi.com (Vincent Pelletier)
Date: Wed, 25 May 2011 22:58:21 +0000
Subject: [Neo-dev] impossible to undo transactions in Zope
In-Reply-To: <4DDD1818.8040205@nexedi.com>
References: <4DDD1818.8040205@nexedi.com>
Message-ID: <201105252258.22006.vincent@nexedi.com>

Le mercredi 25 mai 2011 14:54:16, Lucas Carvalho a ?crit :
>   When I try to undo a transaction (i.e. manage_delObjects) using Zope
> Manager Interface. The neostorage dies with the error below.
[...]
>    File "/media/hd/nexedi/neo/neo/storage/database/manager.py", line 259,
> in getObject
>      before_tid <= next_serial
> AssertionError

Looks like an abusive assertion check.
For definite answer, it would be nice to get client traceback too, with packet 
log to that storage.

If loadObject is part of the undo itself, then next_serial is indeed smaller 
than before_tid (we are making the object go "back in time").

Otherwise, it might be another bug.

Regards,
-- 
Vincent Pelletier