So... I had to set up cluster on JBoss to use it as a load balancer for data loading.
I had a problem with deployment of test and production servers.
If you have several servers pointing to different databases and running different versions of application then it's not that great if you are using the same partition configuration setup.
The solution is to deploy each server with different partition name. Without it "master-node" will schedule jobs on all known nodes in the same partition which means it won't load data into one database but to all of them - and this obviously isn't our goal :)
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