[zope2-tracker] [Bug 142129] Re: THUNKED_TM mismatch with TM.TM

[Tres Seaver]

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Tres Seaver wrote:
> Brad Clements wrote:
>> We are using gvibDA and Firebird.
> 
>> The patch from 2001 is for Zope 2.5.
> 
>> I see we're currently running Zope 2.7.2-0 and it does not have the
>> THUNK.py patch applied.
> 
>> However we're running all our Zope instances in single-threaded  mode
>> due to unreliability with the DB adapter.
> 
>> Interesting, I think when upgrading from 2.5 to 2.7.2 we forgot to re-
>> apply our suggested patch. Then Zope got  unreliable and instead of
>> figuring it out again and applying the patch, we just moved to single-
>> threaded mode behind Pound.
> 
>> ---
> 
>> The point of the patch is to make sure that changes to self._registered
>> occur only while the lock is held. Without this change the THUNKED_TM
>> instance can appear as still being registered even when it is no longer
>> registered due to the lock being released (thereby allowing another
>> thread to pick up the THUNKED_TM instance) before self._registered is
>> set to 0
> 
> I think I get the point:  my worry is that I don't use any "thunked"
> database adapter myself, and wouldn't have a way to know that I broke
> something,
> 
> I know you guys are still running a 2.7.x Zope:  would you be able to
> test the gvibDA against a 2.12 branch checkout?  I will try installing
> firebird2.1-classic on my machine and see if I can at least connect and
> run SQL queries.

Ugh, I have to admit defeat there -- stock installs of firefox2.1-super
on my box (Ubuntu Jaunty) failed to bring the server up cleanly.


Tres.
- --
===================================================================
Tres Seaver          +1 540-429-0999          tseaver at palladion.com
Palladion Software   "Excellence by Design"    http://palladion.com
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THUNKED_TM mismatch with TM.TM
https://bugs.launchpad.net/bugs/142129
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