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Posted to mapreduce-issues@hadoop.apache.org by "Gera Shegalov (JIRA)" <ji...@apache.org> on 2015/01/06 02:27:36 UTC
[jira] [Commented] (MAPREDUCE-6205) Update the value of the new
version properties of the deprecated property "mapred.child.java.opts"
[ https://issues.apache.org/jira/browse/MAPREDUCE-6205?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14265505#comment-14265505 ]
Gera Shegalov commented on MAPREDUCE-6205:
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[~sam liu], the test failure you see should go away if you implement suggestion 3 from my previous comment.
> Update 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
> Affects Versions: trunk
> Reporter: sam liu
> Assignee: sam liu
> Priority: Minor
> Attachments: MAPREDUCE-6205.patch, 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.
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