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From "Eli Collins (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-8154) DNS#getIPs shouldn't silently return the local host IP for bogus interface names
Date Fri, 23 Mar 2012 03:24:22 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-8154?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Eli Collins updated HADOOP-8154:
--------------------------------

          Resolution: Fixed
       Fix Version/s: 1.1.0
    Target Version/s:   (was: 1.1.0)
              Status: Resolved  (was: Patch Available)

Merged to branch-1.
                
> DNS#getIPs shouldn't silently return the local host IP for bogus interface names
> --------------------------------------------------------------------------------
>
>                 Key: HADOOP-8154
>                 URL: https://issues.apache.org/jira/browse/HADOOP-8154
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: conf
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>             Fix For: 1.1.0, 0.23.3
>
>         Attachments: hadoop-8154-b1.txt, hadoop-8154.txt
>
>
> DNS#getIPs silently returns the local host IP for bogus interface names. In this case
let's throw an UnknownHostException. This is technically an incompatbile change. I suspect
the current behavior was origininally introduced so the interface name "default" works w/o
explicitly checking for it. It may also be used in cases where someone is using a shared config
file and an option like "dfs.datanode.dns.interface" or "hbase.master.dns.interface" and eg
interface "eth3" that some hosts don't have, though I think silently ignorning this is the
wrong behavior (those hosts should be configured to use a different interface).

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