https://community.cloudera.com/t5/Archives-of-Support-Questions/CDH4-Add-new-node-to-existing-cluster/m-p/20984#M3441 <P>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 ?</P><P>I have used&nbsp;cdh4-repository_1.0_all.deb&nbsp;</P> Fri, 16 Sep 2022 09:10:56 GMT debabrata_p 2022-09-16T09:10:56Z https://community.cloudera.com/t5/Archives-of-Support-Questions/CDH4-Add-new-node-to-existing-cluster/m-p/20984#M3441 <P>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 ?</P><P>I have used&nbsp;cdh4-repository_1.0_all.deb&nbsp;</P> Fri, 16 Sep 2022 09:10:56 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/CDH4-Add-new-node-to-existing-cluster/m-p/20984#M3441 debabrata_p 2022-09-16T09:10:56Z https://community.cloudera.com/t5/Archives-of-Support-Questions/CDH4-Add-new-node-to-existing-cluster/m-p/21131#M3442 <P>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.</P><P>&nbsp;</P><P>br</P> Sun, 02 Nov 2014 19:47:33 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/CDH4-Add-new-node-to-existing-cluster/m-p/21131#M3442 flyflap 2014-11-02T19:47:33Z