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Posted to common-issues@hadoop.apache.org by "Arpit Agarwal (JIRA)" <ji...@apache.org> on 2015/09/24 20:41:05 UTC

[jira] [Updated] (HADOOP-12437) Allow SecurityUtil to lookup alternate hostnames

     [ 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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