Maybe this has been discussed before, I did some searching thru 
the list archives and couldn't find anything...

I wrote a multithreaded unit test to test out my persistence layer.  I 
kick off threads and they each do the same query.  When I make 
the number of threads greater than the number of pb instances in 
the pool, I get a NoSuchElementException thrown.

This may all be painfully obvious behavior but I guess I'm wondering 
a few things:  
1) Is this in fact supposed to happen?  i.e. does this mean i'm doing 
something wrong or have something configured wrong?
2) should I be the one catching the NoSuchElementException and 
manually creating a new broker instance?
3) should I just not worry about this, because a situation like this is 
so unlikely in the real world (20+ simultaneous requests for a pb)?
4) is the normal solution to this problem just to jack up the number 
of pb instances in the pool to some number via the props file, and 
just hope your app doesn't need more than that number of 
connections at the same time?
5) from a best practices perspective, is this the behavior you'd want 
to happen?  I was thinking maybe you'd have something that 
sensed when the pb pool was low/empty and instanciated new 
instances on the fly.  Maybe that has negative ramifications.  This is 
an honest question asked out of ignorance: I'm not at all implying 
that something different should be done.

Regards,
Steve


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