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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-9109) dfs.datanode.dns.interface does not work with hosts file based setups
Date Fri, 18 Sep 2015 20:42:04 GMT
Arpit Agarwal created HDFS-9109:
-----------------------------------

             Summary: dfs.datanode.dns.interface does not work with hosts file based setups
                 Key: HDFS-9109
                 URL: https://issues.apache.org/jira/browse/HDFS-9109
             Project: Hadoop HDFS
          Issue Type: Bug
          Components: datanode
            Reporter: Arpit Agarwal
            Assignee: Arpit Agarwal


The configuration setting {{dfs.datanode.dns.interface}} lets the DataNode select its hostname
by doing a reverse lookup of IP addresses on the specific network interface. This does not
work {{when /etc/hosts}} is used to setup alternate hostnames, since {{DNS#reverseDns}} only
queries the DNS servers.

Let's add a fallback option for hosts file.



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