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From "Thomas FRIOL (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 16:47:17 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-366?page=comments#action_12421664 ] 
            
Thomas FRIOL commented on HADOOP-366:
-------------------------------------

Owen,

I think you did not understand correctly my explanations. I will try to be more precise.

In fact, when I am writting a new job using a jobConf.xml file, I am able to define a custom
jar using the property 'mapred.jar'. This jar is the uploaded to the DFS and then appended
to the Hadoop classpath of each task tracker.

The exact purpose of my problem is that today, we can specify only one jar and I think it
could be great to be able to specify a comma separated list of jars so that we do not have
to build a single jar with differents existing jars to give it to each Hadoop task tracker.

Am I more precise now ?

Thanks for your help.

> 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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