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https://issues.apache.org/jira/browse/MAPREDUCE-5215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13822216#comment-13822216
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Robert Kanter commented on MAPREDUCE-5215:
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I agree, the method was marked as package private, so we made no guarantees
about its availability. We don't want to set a precedent for this.
> mapreduce.Job is missing getJobClient() so its incompatible with MR1
> --------------------------------------------------------------------
>
> Key: MAPREDUCE-5215
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-5215
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Components: mrv2
> Affects Versions: 2.2.0
> Reporter: Robert Kanter
> Assignee: Robert Kanter
> Priority: Blocker
> Attachments: MAPREDUCE-5215.patch, MAPREDUCE-5215.patch,
> MAPREDUCE-5215.patch
>
>
> The method {{org.apache.hadoop.mapred.JobClient getJobClient()}} is in MR1's
> {{mapreduce.Job}} but doesn't exist in MR2's, which makes them incompatible.
> MR2's implementation of {{Job}} doesn't use a JobClient object, but we can
> create one and return it.
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