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From "Ranjit Mathew (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-2065) Tutorial includes overly specified compilation command
Date Tue, 14 Sep 2010 10:59:35 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2065?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12909187#action_12909187
] 

Ranjit Mathew commented on MAPREDUCE-2065:
------------------------------------------

The tutorial for 0.20.2 is here:

  http://hadoop.apache.org/common/docs/r0.20.2/mapred_tutorial.html

and contains only the one JAR that you expect.

The current tutorial:

  http://hadoop.apache.org/mapreduce/docs/current/mapred_tutorial.html

lists three separate JARs because after 0.20.2 the project was split into
"common", "hdfs" and "mapreduce", each having its own JARs.

> Tutorial includes overly specified compilation command
> ------------------------------------------------------
>
>                 Key: MAPREDUCE-2065
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2065
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: documentation
>    Affects Versions: 0.20.2
>            Reporter: Clarence Gardner
>            Priority: Trivial
>
> The tutorial (mapred_tutorial.html) shows a command line to compile the wordcount program.
It specifically mentions three Hadoop-supplied jar files in the classpath, but in my 0.20.2
installation (and I assume, later ones as well), only one is necessary, that being "core".
In fact, the mentioned mapred and hdfs jars are not even present in my HADOOP_HOME directory.

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