[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.

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