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From "jiraposter@reviews.apache.org (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7314) Add support for throwing UnknownHostException when a host doesn't resolve
Date Mon, 23 May 2011 15:51:47 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7314?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13038002#comment-13038002
] 

jiraposter@reviews.apache.org commented on HADOOP-7314:
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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/775/
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Review request for hadoop-common and hadoop-mapreduce.


Summary
-------

As part of MAPREDUCE-2489, we need support for having the resolve methods (for DNS mapping)
throw UnknownHostExceptions. (Currently, they hide the exception). Since the existing 'resolve'
method is ultimately used by several other locations/components, I propose we add a new 'resolveValidHosts'
method.


This addresses bug HADOOP-7314.
    https://issues.apache.org/jira/browse/HADOOP-7314


Diffs
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  trunk/src/java/org/apache/hadoop/net/DNSToSwitchMapping.java 1125067 
  trunk/src/java/org/apache/hadoop/net/ScriptBasedMapping.java 1125067 
  trunk/src/test/core/org/apache/hadoop/net/StaticMapping.java 1125067 
  trunk/src/test/core/org/apache/hadoop/net/TestScriptBasedMapping.java 1125067 
  trunk/src/java/org/apache/hadoop/net/CachedDNSToSwitchMapping.java 1125067 

Diff: https://reviews.apache.org/r/775/diff


Testing
-------


Thanks,

Jeffrey



> Add support for throwing UnknownHostException when a host doesn't resolve
> -------------------------------------------------------------------------
>
>                 Key: HADOOP-7314
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7314
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Jeffrey Naisbitt
>            Assignee: Jeffrey Naisbitt
>         Attachments: HADOOP-7314.patch
>
>
> As part of MAPREDUCE-2489, we need support for having the resolve methods (for DNS mapping)
throw UnknownHostExceptions.  (Currently, they hide the exception).  Since the existing 'resolve'
method is ultimately used by several other locations/components, I propose we add a new 'resolveValidHosts'
method.

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