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I have issue with dfs in hadoop. Does somebody know how to solve my problem?

[hduser@evghost ~]$ start-dfs.sh 
Starting namenodes on [evghost]
Error: Please specify one of --hosts or --hostnames options and not both.
evghost: starting datanode, logging to /usr/lib/hadoop-2.7.1/logs/hadoop-hduser-datanode-evghost.out
Starting secondary namenodes [0.0.0.0]
Error: Please specify one of --hosts or --hostnames options and not both.

As you can see here is something with hosts and hostname. I don't know what to do here about 2 days... I didn't find any solution of this problem in internet, help me please.

me-evgnc
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1 Answers1

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It's issue with DNS server. If you have a hostname not like 'localhost' you'll not to be able to deploy a pseudo mode for dfs because DNS won't give you ip address from your request domain name. Here i had a hostname evghost, lets look:

[main@evghost ~]$ host evghost
Host evghost not found: 3(NXDOMAIN)

DNS didn't get answer to you. Noway to deal with it, but you can set up your own dns server in your PC. Much pain, but i think it can works.

Solution is to post

localhost

in /etc/hostname and NOT another! I spend 2 days to understand that, hate this technology and like it together.

me-evgnc
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