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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (MAPREDUCE-4408) allow jobs to set a JAR that is in the distributed cached
Date Mon, 30 Jul 2012 21:21:35 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alejandro Abdelnur reassigned MAPREDUCE-4408:
---------------------------------------------

    Assignee: Robert Kanter  (was: Alejandro Abdelnur)

reassigning it Robert as he is doing the Oozie JIRA that requires this one.
                
> allow jobs to set a JAR that is in the distributed cached
> ---------------------------------------------------------
>
>                 Key: MAPREDUCE-4408
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4408
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: mrv1, mrv2
>    Affects Versions: 1.0.3, 2.0.0-alpha
>            Reporter: Alejandro Abdelnur
>            Assignee: Robert Kanter
>
> Setting a job JAR with JobConf.setJar(String) and Job.setJar(String) assumes that the
JAR is local to the client submitting the job, thus it triggers copying the JAR to HDFS and
injecting it to the distributed cached.
> AFAIK, this is the only way to use uber JARs (JARs with JARs inside) in MR jobs.
> For jobs launched by Oozie, all JARs are already in HDFS. In order for Oozie to suport
uber JARs (OOZIE-654) there should be a way for specifying as JAR a JAR that is already in
HDFS.

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