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From "Akira AJISAKA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-12466) MapReduce tutorial clarifications
Date Sun, 20 Dec 2015 14:58:46 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-12466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15065791#comment-15065791

Akira AJISAKA commented on HADOOP-12466:

Committing this patch.
bq. -1 whitespace
Actually there are no trailing whitespace in the patch. I'll file a jira in Yetus project.
bq. -1 asflicense
This is caused by HDFS-9173. I asked Zhe Zhang to fix it.

> MapReduce tutorial clarifications
> ---------------------------------
>                 Key: HADOOP-12466
>                 URL: https://issues.apache.org/jira/browse/HADOOP-12466
>             Project: Hadoop Common
>          Issue Type: Improvement
>          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)
> {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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