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https://issues.apache.org/jira/browse/MAPREDUCE-6583?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15071855#comment-15071855
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Marco Zühlke commented on MAPREDUCE-6583:
-----------------------------------------
In the end is was a Yetus bug. See YETUS-260.
> Clarify confusing sentence in MapReduce tutorial document
> ---------------------------------------------------------
>
> Key: MAPREDUCE-6583
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-6583
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: documentation
> Reporter: chris snow
> Assignee: Kai Sasaki
> Priority: Minor
> Fix For: 2.8.0, 2.7.3
>
> Attachments: HADOOP-12466.01.patch
>
>
> The current MapReduce tutorial has the following statement which is confusing:
> {quote}
> Overall, Mapper implementations are passed the Job for the job via the
> Job.setMapperClass(Class) method.
> {quote}
> The sentence seems to contradict itself. The code shows the mapper getting
> passed to the job. However, the working suggests that the job is passed to
> the mapper?
> https://hadoop.apache.org/docs/current/hadoop-mapreduce-client/hadoop-mapreduce-client-core/MapReduceTutorial.html#Mapper
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