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Posted to mapreduce-issues@hadoop.apache.org by "Akira AJISAKA (JIRA)" <ji...@apache.org> on 2015/12/20 16:05:46 UTC

[jira] [Moved] (MAPREDUCE-6583) MapReduce tutorial clarifications

     [ https://issues.apache.org/jira/browse/MAPREDUCE-6583?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Akira AJISAKA moved HADOOP-12466 to MAPREDUCE-6583:
---------------------------------------------------

    Component/s:     (was: documentation)
                 documentation
     Issue Type: Bug  (was: Improvement)
            Key: MAPREDUCE-6583  (was: HADOOP-12466)
        Project: Hadoop Map/Reduce  (was: Hadoop Common)

> MapReduce tutorial clarifications
> ---------------------------------
>
>                 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
>         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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