Description

If running the management agent on a host with multiple network interfaces, the create domain command may fail if not all network interfaces are on the same subnet:

hadbm:Error 22020: The management agents could not establish a 
domain, please check that the hosts can communicate with UDP multicast.

The management agents will (if not configured otherwise) use the “first” interface for UDP multicasts (“first” as defined by the result from java.net.NetworkInterface.getNetworkInterfaces()).