Arpit Agarwal created HDFS-9109:
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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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