[jira] [Created] (MAPREDUCE-6205) Updated the value of the new version properties of the deprecated property "mapred.child.java.opts"

["sam liu (JIRA)" <ji...@apache.org>]

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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