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From "Jean-Baptiste Quenot (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-366) Should be able to specify more than one jar into a JobConf file
Date Mon, 28 Aug 2006 15:59:23 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-366?page=comments#action_12430995 ] 
            
Jean-Baptiste Quenot commented on HADOOP-366:
---------------------------------------------

In fact Owen's point is to say that you can put jars in the jar.

Is there any reason for this "hack" to unpack mapred.jar in TaskRunner and look for a "lib"
directory containing jars?  Isn't that too much of magic?

Would it be a viable option to allow MapReduce tasks to take a list of jars instead?  Or is
there a compelling reason to only give a single Jar?

> 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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