[MAPREDUCE-6627] Add machine-readable output to mapred job -history command

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.9.0
• Fix Version/s: 2.9.0, 3.0.0-alpha1
• Component/s: client
• Target Version/s: 2.9.0
• Hadoop Flags: Reviewed
• Assignee: Robert Kanter
• Reporter: Robert Kanter
• Created: 04/Feb/16 01:24
• Updated: 30/Aug/16 01:14
• Resolved: 19/Feb/16 02:05

Description

It would be great if we could add a machine-readable output format, say JSON, to the mapred job -history [all] <jobHistoryFile> command so that it's easier for programs to consume that information and do further processing on it. At the same time, we should keep the existing API and formatting intact for backwards compatibility.