Add support for throwing UnknownHostException when a host doesn't resolve
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Key: HADOOP-7314
URL: https://issues.apache.org/jira/browse/HADOOP-7314
Project: Hadoop Common
Issue Type: Improvement
Reporter: Jeffrey Naisbitt
Assignee: Jeffrey Naisbitt
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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