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https://issues.apache.org/jira/browse/HADOOP-8372?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Todd Lipcon updated HADOOP-8372:
--------------------------------
Fix Version/s: (was: 3.0.0)
(was: 2.0.0)
2.0.1
> normalizeHostName() in NetUtils is not working properly in resolving a
> hostname start with numeric character
> ------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-8372
> URL: https://issues.apache.org/jira/browse/HADOOP-8372
> Project: Hadoop Common
> Issue Type: Bug
> Components: io, util
> Affects Versions: 1.0.0, 0.23.0
> Reporter: Junping Du
> Assignee: Junping Du
> Fix For: 2.0.1
>
> Attachments: HADOOP-8372-v2.patch, HADOOP-8372-v3.patch,
> HADOOP-8372.patch, HADOOP-8372.patch
>
>
> A valid host name can start with numeric value (You can refer RFC952, RFC1123
> or http://www.zytrax.com/books/dns/apa/names.html), so it is possible in a
> production environment, user name their hadoop nodes as: 1hosta, 2hostb, etc.
> But normalizeHostName() will recognise this hostname as IP address and return
> directly rather than resolving the real IP address. These nodes will be
> failed to get correct network topology if topology script/TableMapping only
> contains their IPs (without hostname).
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