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https://issues.apache.org/jira/browse/HADOOP-5339?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Chris Douglas resolved HADOOP-5339.
-----------------------------------

    Resolution: Duplicate

Fixed in HADOOP-3426

> reverse DNS doesnt resolve local loop address 127.0.1.1
> -------------------------------------------------------
>
>                 Key: HADOOP-5339
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5339
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: io
>    Affects Versions: 0.21.0
>         Environment: at home, incomplete networking, exploring the 
> consequences
>            Reporter: Steve Loughran
>            Priority: Minor
>
> if the local IPAddr is loopback, then reverse DNS lookup fails. It may be 
> better to recognise this state and return localhost in such a situation, 
> rather than try to look up 1.1.0.127.in-addr.arpa

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