[MAPREDUCE-6205] Update the value of the new version properties of the deprecated property "mapred.child.java.opts"

• Type: Bug
• Status: Patch Available
• Priority: Minor
• Resolution: Unresolved
• Component/s: mrv2
• Labels: BB2015-05-TBR
• Assignee: sam liu
• Reporter: sam liu
• Created: 24/Dec/14 04:40
• Updated: 06/May/15 03:27

Description

In current hadoop code, the old property "mapred.child.java.opts" is deprecated and its new versions are MRJobConfig.MAP_JAVA_OPTS and MRJobConfig.REDUCE_JAVA_OPTS. However, when user set a value to the deprecated property "mapred.child.java.opts", hadoop won't automatically update its new versions properties MRJobConfig.MAP_JAVA_OPTS("mapreduce.map.java.opts") and MRJobConfig.REDUCE_JAVA_OPTS("mapreduce.reduce.java.opts"). As hadoop will update the new version properties for many other deprecated properties, we also should support such feature on the old property "mapred.child.java.opts", otherwise it might bring some imcompatible issues.

Issue Links

• is related to: MAPREDUCE-5130 Add missing job config options to mapred-default.xml