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https://issues.apache.org/jira/browse/HADOOP-2268?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12553980
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Hadoop QA commented on HADOOP-2268:
-----------------------------------

+1 overall.  Here are the results of testing the latest attachment 
http://issues.apache.org/jira/secure/attachment/12372086/HADOOP-2268-4.patch
against trunk revision r606058.

    @author +1.  The patch does not contain any @author tags.

    javadoc +1.  The javadoc tool did not generate any warning messages.

    javac +1.  The applied patch does not generate any new compiler warnings.

    findbugs +1.  The patch does not introduce any new Findbugs warnings.

    core tests +1.  The patch passed core unit tests.

    contrib tests +1.  The patch passed contrib unit tests.

Test results: 
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1418/testReport/
Findbugs warnings: 
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1418/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: 
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1418/artifact/trunk/build/test/checkstyle-errors.html
Console output: 
http://lucene.zones.apache.org:8080/hudson/job/Hadoop-Patch/1418/console

This message is automatically generated.

> JobControl classes should use interfaces rather than implemenations
> -------------------------------------------------------------------
>
>                 Key: HADOOP-2268
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2268
>             Project: Hadoop
>          Issue Type: Improvement
>          Components: mapred
>    Affects Versions: 0.15.0
>            Reporter: Adrian Woodhead
>            Assignee: Adrian Woodhead
>            Priority: Minor
>             Fix For: 0.16.0
>
>         Attachments: HADOOP-2268-1.patch, HADOOP-2268-2.patch, 
> HADOOP-2268-3.patch, HADOOP-2268-4.patch
>
>
> See HADOOP-2202 for background on this issue. Arun C. Murthy agrees that when 
> possible it is preferable to program against the interface rather than a 
> concrete implementation (more flexible, allows for changes of the 
> implementation in future etc.) JobControl currently exposes running, waiting, 
> ready, successful and dependent jobs as ArrayList rather than List. I propose 
> to change this to List.
> I will code up a patch for this.

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