sam liu created MAPREDUCE-6205:
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Summary: Updated the value of the new version properties of the
deprecated property "mapred.child.java.opts"
Key: MAPREDUCE-6205
URL: https://issues.apache.org/jira/browse/MAPREDUCE-6205
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mrv2
Reporter: sam liu
Assignee: sam liu
Priority: Minor
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.
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