Subject: MirrorMaker 2.0 ( working off origin/2.4 )

Hello folks,
                  Was doing stress tests and realized that the replication
to the target cluster and thus the configuration of the KafkaProducer has a
default acks of -1 ( all ) and that was prohibitively expensive. It should
have been a simple a->b.producer.acks = 1 ( or  b.producer.acks = 1 or acks
= 1, have tried all ) override in the, but it does not take.
I verified by turning on TRACE and a little  instrumenting the code to
print out the acks .
 Am I missing something?