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From "Runping Qi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1622) Hadoop should provide a way to allow the user to specify jar file(s) the user job depends on
Date Fri, 20 Jul 2007 17:32:06 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12514256
] 

Runping Qi commented on HADOOP-1622:
------------------------------------


One enhancement will be to unjar the jars in the reversed order of the jars in the option
spec. 
That way, if there is any class colission, the one in the front in the original list will
win.


> Hadoop should provide a way to allow the user to specify jar file(s) the user job depends
on
> --------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-1622
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1622
>             Project: Hadoop
>          Issue Type: Improvement
>            Reporter: Runping Qi
>         Attachments: multipleJobJars.patch
>
>
> More likely than not, a user's job may depend on multiple jars.
> Right now, when submitting a job through bin/hadoop, there is no way for the user to
specify that. 
> A walk around for that is to re-package all the dependent jars into a new jar or put
the dependent jar files in the lib dir of the new jar.
> This walk around causes unnecessary inconvenience to the user. Furthermore, if the user
does not own the main function 
> (like the case when the user uses Aggregate, or datajoin, streaming), the user has to
re-package those system jar files too.
> It is much desired that hadoop provides a clean and simple way for the user to specify
a list of dependent jar files at the time 
> of job submission. Someting like:
> bin/hadoop .... --depending_jars j1.jar:j2.jar 

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