It's correct you see the node-agent from the other machine, but before starting it on the other machine I saw also Unknown host waiting.... If you didn't do it already start on the other machine the node-agent, using asadmin start-node-agent <namenodeagent> on the second machine.
Also make sure the hostnames don't point to 127.0.0.1 On both sides so in /etc/hosts there should be
192.168.1.1 server1
192.168.1.2 server2
Or the number they have on your network, but NOT 127.0.0.1
Johan
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