[jira] [Updated] (HADOOP-7806) [DNS] Support binding to sub-interfaces

["Eli Collins (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HADOOP-7806?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eli Collins updated HADOOP-7806:
--------------------------------

    Attachment: hadoop-7806.txt

Here's an updated patch that's a delta from HADOOP-8154. It's hard to test a sub-interface explicitly in TestDNS without mocking NetworkInterface itself (which means we're not testing it). I think that's OK because we've tested with a tarball on a host with sub-interfaces and the new getSubinterface method is exercised by testIPsOfUnknownInterface which will pass go down this path (and will check all interfaces and sub-interfaces since it won't be ale to determine the interface for "name-of-an-unknown-interface"). 
                
> [DNS] Support binding to sub-interfaces
> ---------------------------------------
>
>                 Key: HADOOP-7806
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7806
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: util
>    Affects Versions: 0.24.0
>            Reporter: Harsh J
>            Assignee: Harsh J
>             Fix For: 0.24.0
>
>         Attachments: HADOOP-7806.patch, HADOOP-7806.patch, hadoop-7806.txt
>
>
> Right now, with the {{DNS}} class, we can look up IPs of provided interface names ({{eth0}}, {{vm1}}, etc.). However, it would be useful if the I/F -> IP lookup also took a look at subinterfaces ({{eth0:1}}, etc.) and allowed binding to only a specified subinterface / virtual interface.
> This should be fairly easy to add, by matching against all available interfaces' subinterfaces via Java.

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