[HADOOP-7314] Add support for throwing UnknownHostException when a host doesn't resolve

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.20.205.0, 0.23.0
• Fix Version/s: 0.20.205.0, 0.23.0
• Assignee: Jeffrey Naisbitt
• Reporter: Jeffrey Naisbitt
• Created: 20/May/11 14:22
• Updated: 02/May/13 02:29
• Resolved: 19/Jul/11 23:19

Description

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.

Issue Links

• is depended upon by: MAPREDUCE-2489 Jobsplits with random hostnames can make the queue unusable