[Zope-dev] Conflict errors on startup, revisited

[Paul Winkler]

On Thu, Feb 24, 2005 at 02:58:01PM -0500, Chris McDonough wrote:
> On Thu, 2005-02-24 at 14:57, Paul Winkler wrote:
> > On Thu, Feb 24, 2005 at 02:52:45PM -0500, Chris McDonough wrote:
> > > Two words: *hurt system*.  Please, let me kill it.
> > 
> > Interesting. How on earth did you determine that?
> 
> Womanly intuition.
> 
> > 
> > You think it has to do with registering help for
> > PluginIndexes? I'm gonna go test that theory -
> > i'll hack registerHelp() to no-op.
> 
> That's a good verifier.

Well, no joy.  I hacked ProductContext.register* to
return from the first line, so even registerClass()
now does nothing.  Barf, I still get the ConflictError.

Twiddling around with some old suggestions from Dieter
Maurer (see
http://aspn.activestate.com/ASPN/Mail/Message/Zope-CMF/1978842 ),
I added a _p_jar.sync() where he suggested - right
before the final "except:" in initialize_product().
No joy.  

But - duh - my traceback clearly shows the ConflictError
happens before that, in the call to get_transaction().commit().
SO I moved the call to app._p_jar.sync() to right before hte call
to get_transaction().commit().
Aaaand... no more ConflictError.

Weird weird weird.

I'd be happy to check this in to cvs / svc, except that
A) I have no clue how to write a test that exercises the bug,
and B) so far nobody seems to understand what's really happening.

If nobody objects, I wouldnt' mind checking the fix in anyway :-)


-- 

Paul Winkler
http://www.slinkp.com