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https://issues.apache.org/jira/browse/HADOOP-8372?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13272353#comment-13272353
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Hudson commented on HADOOP-8372:
--------------------------------
Integrated in Hadoop-Mapreduce-trunk #1075 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1075/])
HADOOP-8372. NetUtils.normalizeHostName() incorrectly handles hostname
starting with a numeric character. Contributed by Junping Du. (Revision 1336446)
Result = SUCCESS
suresh : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1336446
Files :
* /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt
*
/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/net/NetUtils.java
*
/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/net/TestNetUtils.java
*
/hadoop/common/trunk/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/net/TestTableMapping.java
> 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: 2.0.0, 3.0.0
>
> 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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