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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-12437) Allow SecurityUtil to lookup alternate hostnames
Date Thu, 24 Sep 2015 18:41:05 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-12437?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Arpit Agarwal updated HADOOP-12437:
    Summary: Allow SecurityUtil to lookup alternate hostnames   (was: dfs.datanode.dns.interface
does not work with hosts file based setups)

> Allow SecurityUtil to lookup alternate hostnames 
> -------------------------------------------------
>                 Key: HADOOP-12437
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12437
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: net, security
>            Reporter: Arpit Agarwal
>            Assignee: Arpit Agarwal
>         Attachments: HADOOP-12437.04.patch, HADOOP-12437.05.patch, HDFS-9109.01.patch,
HDFS-9109.02.patch, HDFS-9109.03.patch
> 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.

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