CDH4 : Add new node to existing cluster

[#1]

I have successfully created hadoop cluster with CDH4 on ubuntu . I have created this with one master(master) and one slave(slave1) . Now I want to add one more cluster . For this I just cloned slave2 and updated hosts and ssh accordingly . Then I updated conf/slaves file with all datanode dns names in all nodes and restarted everything . But it's not detecting the new datanode instead it only shows the old one that is slave1 not slave2 . Can anyone please help me on this ?

I have used cdh4-repository_1.0_all.deb 

[#2 · Accepted solution]

If you start the cluster manually (so you start all services manually) you dont even need the slaves file and ssh. This is only needed if you use the start scripts. The datanode will contact its configured namenode on startup and "offer" his service. So if you started the datanode manually, you should check its log file and see why he is not able to contact the namenode.

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