Hi,

A quick question, maybe you can help?

Trying to follow this article 
https://cwiki.apache.org/confluence/display/KAFKA/KIP-382%3A+MirrorMaker+2.0 -> 
"Walkthrough: Running MirrorMaker 2.0", and the last lines in the paragraph are

======
Second, launch one or more MirrorMaker cluster nodes:
$ ./bin/connect-mirror-maker.sh mm2.properties
======

But apparently it does not work this way, one of 2 simultaneously started 
instance will remain idle, confirmed with Jconsole -> Mbeans.
Setup: Broker A (in cluster A) -> MM2 2 instances -> Broker B (cluster B), for 
simplicity there is only one broker per cluster.
A simple experiment is, when one instance is configured and started to 
replicate topic A only and another topic B only, only one topic will be 
replicated, when 2 instances are running in parallel. While, if only one of the 
instances is running at a time, each topic will be replicated correctly.

The main question -> is Mirrormaker 2 horizontally scalable? And if yes, would 
be possible to share a link to a document that describes the setup process?

Thanks in advance,
Dmitri.


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