Hi Steffen,

> This is a problem with your application.
> You are updating two database records with reference to each other

at the

> same time (roughly).
> Check, which updates occur in what transaction context.

the problem is that this problem did not occur if the applications
(multiple JOnAS intances) did not get any big loads (about 300 - 500
concurrent users)... And without changing the application only by
switching to Classic architecture seems to solve this problem...

I have to admit that the JOnAS version is a bit out dated, so maybe
updating the JOnAS instances would help to solve this problem?

Has anyone any experiences with SuperServer in a middle to big
environments?

Thanks a lot!
Lofi.