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https://issues.apache.org/jira/browse/HADOOP-2690?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12563713#action_12563713
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Doug Cutting commented on HADOOP-2690:
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The attached patch does not implement what I thought Enis suggested. It
creates a single jar with all the other jars flattened into it. I'm not sure
what the purpose of such a jar is and whether such a target belongs in Hadoop's
build.xml.
I took Enis to be suggesting that we break the "compile-core-test" target in
two, one with the 'javac' tasks and one with the 'jar' task. There are a bunch
of other tasks in "compile-core-test" that will need to be delt with too. At a
glance, I suspect most of these should remain in "compile-core-test" and just
the 'jar' task should be moved to the new task, jar-core-test. Then
dependencies need to be adjusted so that things still work.
> Adding support into build.xml to build a special hadoop jar file that has the
> MiniDFSCluster and MiniMRCluster classes among others necessary for building
> and running the unit tests of Pig on the local mini cluster
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-2690
> URL: https://issues.apache.org/jira/browse/HADOOP-2690
> Project: Hadoop Core
> Issue Type: Improvement
> Components: build
> Affects Versions: 0.15.3
> Reporter: Xu Zhang
> Fix For: 0.17.0
>
> Attachments: AddTestUtilsJarTarget.patch, build.xml,
> hadoop-0.16.0-dev-test-utils.jar
>
>
> In order to build Pig and run its unit tests with ant, Pig needs to be built
> and run against a hadoop jar file that not only has the MiniDFSCluster and
> MiniMRCluster classes but also has classes from several 3rd party libraries.
> I added a target to the build.xml file of Hadoop for that purpose (see the
> "Compile code for Pig" section in the attached build.xml). I also attached
> the resulted hadoop jar with this report.
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