No, I don't think so. This is a (J)BPM application where each user has their 
own tasks etc., so concurrent modifications of the same data should be very 
rare. In any case, with only a couple of users (~20) using the application, as 
there were at the time we tested, it would be impossible to get that many 
concurrent modification errors in such a short time. And more importantly, we 
were getting these errors with objects that are modified very rarely or even 
never at all. Really, one type of these objects is never ever modified after 
being created, so how could it be "concurrently modified"???

Regarding those pessimistic locking errors: they seem to be suppressed in the 
way that they don't cause any malfunctioning, but why are they logged as ERROR? 
JBossCache 1.2.4 at least logged just the error alone, without the stack trace, 
but 1.3 logs the entire stack, which is really inappropriate for expected 
behaviour. Can this be switched off somehow?

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