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https://issues.apache.org/jira/browse/HADOOP-17064?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17125764#comment-17125764
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Steve Loughran commented on HADOOP-17064:
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better make sure that Spark's committer binding logic switches to mrv2
> Drop MRv1 binary compatibility in 4.0.0
> ---------------------------------------
>
> Key: HADOOP-17064
> URL: https://issues.apache.org/jira/browse/HADOOP-17064
> Project: Hadoop Common
> Issue Type: Sub-task
> Reporter: Rungroj Maipradit
> Priority: Trivial
>
> A code comment suggests making the setJobConf method deprecated along with
> mapred package HADOOP-1230. HADOOP-1230 has been closed a long time ago, but
> the method is still not annotated as deprecated.
> {code:java}
> /**
> * This code is to support backward compatibility and break the compile
> * time dependency of core on mapred.
> * This should be made deprecated along with the mapred package
> HADOOP-1230.
> * Should be removed when mapred package is removed.
> */ {code}
> Comment location:
> [https://github.com/apache/hadoop/blob/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/ReflectionUtils.java#L88]
> From the previous discussion, it seems that this method is still required if
> we ensure binary compatibility with MRv1.
>
> https://issues.apache.org/jira/browse/HADOOP-17047?focusedCommentId=17111702&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-17111702
> Mingliang Liu suggested to Drop MRv1 binary compatibility in 4.0.0
>
> https://issues.apache.org/jira/browse/HADOOP-17047?focusedCommentId=17112442&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-17112442
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