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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-366) Should be able to specify more than one jar into a JobConf file
Date Mon, 17 Jul 2006 16:29:14 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-366?page=comments#action_12421655 ] 
            
Owen O'Malley commented on HADOOP-366:
--------------------------------------

There is functionality in the system that is close to this functionality. Specifically, you
can wrap multiple jars into a single jar in the "lib" directory and they will be expanded.
So if you have 3 jars map.jar, reduce.jar and format.jar, you could put them together into:

% mkdir lib
% mv map.jar reduce.jar format.jar lib
% jar uvf app.jar lib

That will make all 3 jars (and the rest of your jar) available to the framework. Does that
meet your need?

> Should be able to specify more than one jar into a JobConf file
> ---------------------------------------------------------------
>
>                 Key: HADOOP-366
>                 URL: http://issues.apache.org/jira/browse/HADOOP-366
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.4.0
>            Reporter: Thomas FRIOL
>
> A job should be able to specify more than one jar file into its JobConf file because
sometimes custom Map and Reduce classes or just InputFormat classes uses objects coming from
other jar files. For now, we have to build a unique jar to make Hadoop mapreduce operations
works.

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