Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I set up 3 identical linux (CentOS) servers on Vmware. Basically built one and made 2 fully clones.
I edit each servers hostnames : server1, server2,server3 and added them to each other hosts. Worked with ssh and enabled passwordless ssh.
server1 # ssh server2
server2 #
So this works.
Formatted the dfs on the namenode. started the dfs and map-reduce. when i run
$ hadoop dfsadmin -report
it doesnt show any slaves.
what s going on?
any ideas?
Whenever I had this issue, I would be getting namespace collisions on the slave nodes. To resolve this, I deleted everything under each node’s temp directory, then reformatted the namenode. Starting the DFS at this point usually did the trick.