[ZODB-Dev] Weird behaviour on ZEO client

[Roché Compaan]

> Phew, it wasn't ZEO's fault, the server lost time but it has ntp
> installed now.

I was over optimistic, the misterious behaviour is still there :-(
Please, if any of you have an idea how I should debug this it will be
immensely appreciated. In the mean time I'll step through pdb.

> 
> On Tue, 8 Apr 2003 13:34:36 +0200
> Roché Compaan <roche@upfrontsystems.co.za> wrote:
> 
> > I'm experiencing very weird behaviour on one ZEO client:
> > 
> > We have a ZEO client in Germany connecting to a ZEO server in South
> > Africa. The application running on ZEO is a software license manager and
> > whenever you add a single license for a customer it adds anything from 2
> > to 8 licenses, not just a single one as requested. There is no pattern
> > in the number of licenses it adds, but it does seem to have something to
> > do with the slow connection between the ZEO client and the server. Its
> > almost as if the transaction times out and starts again, BUT there are
> > no errors and all licenses end up being committed.
> > 
> > The ZEO client that sits on the same box as the ZEO server does not show
> > this behaviour and we have been running this app for about 2 years
> > without ZEO and it has never done this - so I suspect ZEO is involved.
> > 
> > I might add that adding a license involves changes to many objects and
> > it is quite a big transaction:
> >     - New license gets added
> >     - Renewal certificate gets generated
> >     - Customer status is updated
> >     - Reminders are set for the password and maintenance expiry
> >     - Mail is sent to adminstrator
> > 
> > Problem is that I don't have a clue how to debug this one. Is there any
> > place in the ZEO code where I can insert some logging?


-- 
Roché Compaan
Upfront Systems                 http://www.upfrontsystems.co.za