[jira] [Commented] (MAHOUT-848) M/R job launching code should add Oozie's action.xml as a configuration resource of the Hadoop Configuration object

["Timothy Potter (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAHOUT-848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13293908#comment-13293908 ] 

Timothy Potter commented on MAHOUT-848:
---------------------------------------

Thanks for applying this Grant. Just now getting a chance to test this ...

Unfortunately, it looks as though setConf(null) is a valid state during Job setup so another patch is needed to check for null before calling conf.addResource!

Will post a patch shortly (I have a bunch of changes to my working dir so need to clean it up before building a patch).
                
> M/R job launching code should add Oozie's action.xml as a configuration resource of the Hadoop Configuration object
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: MAHOUT-848
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-848
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Integration
>    Affects Versions: 0.6
>         Environment: oozie workflow
>            Reporter: Timothy Potter
>            Assignee: Grant Ingersoll
>            Priority: Minor
>              Labels: oozie
>             Fix For: 0.7
>
>         Attachments: MAHOUT-848.patch
>
>
> Here's an overview of what is happening:
> Oozie workflow has a sub-workflow (and in my case a sub-workflow to the sub-workflow, so 3 levels down) that launches a Mahout job, such as the vectorizer as a Java action. This job fails due to class loading issues, e.g. vectorizer code cannot load a Lucene class, which it's definitely in the job jar and definitely gets found just fine if launched from a simple Oozie (1-level) workflow.
> The solution is to include Oozie's action.xml as a configuration resource of the Hadoop Configuration object, i.e.
>         String oozieActionConfXml = System.getProperty("oozie.action.conf.xml");            
>         if (oozieActionConfXml != null) {
>             conf.addResource(new Path("file:///", oozieActionConfXml));
>         }
> As you can see, there's no adverse affects if not running in an Oozie workflow. This code could be added to AbstractJob with minimal impact and much benefit to those of us using Mahout in our Oozie workflows.

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