[ https://issues.apache.org/jira/browse/MAPREDUCE-6205?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
sam liu updated MAPREDUCE-6205: ------------------------------- Attachment: MAPREDUCE-6205.patch Unlike many other deprecated properties, the old property "mapred.child.java.opts" does not only has one new version property, but has two new version properties: MRJobConfig.MAP_JAVA_OPTS, MRJobConfig.REDUCE_JAVA_OPTS. So we should add a new function Configuration#DeprecationDelta(String key, String[] newKeys) to support it. > 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 > Attachments: MAPREDUCE-6205.patch > > > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332)