Hi Doug, thanks a lot for reply, it's clear, that there is a parameter for maxClientCnxns, which is 10 by default of course i could increase it to s.th. big. but like i said, the old connections are still there, and i cannot imagine, that this is a correct behaviour, to let them open (established) so this is not a solution of the problem, but a delay
either we must close the old zookeeper connections (i don't knnow how), or we must reuse them by reusing the Configuration object, which (like is said) is not that simple, due to different parameters for each MR job
