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Posted to common-issues@hadoop.apache.org by "Kai Sasaki (JIRA)" <ji...@apache.org> on 2015/12/19 04:26:46 UTC
[jira] [Updated] (HADOOP-12466) MapReduce tutorial clarifications
[ https://issues.apache.org/jira/browse/HADOOP-12466?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Kai Sasaki updated HADOOP-12466:
--------------------------------
Attachment: HADOOP-12466.01.patch
> 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
> 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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