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From "Devaraj Das (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 Sun, 23 Mar 2008 12:51:24 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12581376#action_12581376
] 

Devaraj Das commented on HADOOP-1622:
-------------------------------------

Do you think the dns resolution is going to be a big hit. I don't think so with dns caching
in place, etc. 
Can Pipes make use of this feature (this patch doesn't support pipes). I am ok with having
a separate issue to address pipes if required.
Otherwise, the patch looks fine. 

> 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 Core
>          Issue Type: Improvement
>          Components: mapred
>            Reporter: Runping Qi
>            Assignee: Mahadev konar
>             Fix For: 0.17.0
>
>         Attachments: hadoop-1622-4-20071008.patch, HADOOP-1622-5.patch, HADOOP-1622-6.patch,
HADOOP-1622-7.patch, HADOOP-1622-8.patch, HADOOP-1622-9.patch, HADOOP-1622_1.patch, HADOOP-1622_2.patch,
multipleJobJars.patch, multipleJobResources.patch, multipleJobResources2.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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