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From "Eric Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-7560) Make hadoop-common a POM module with sub-modules (common & alfredo)
Date Wed, 24 Aug 2011 20:24:30 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-7560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13090454#comment-13090454
] 

Eric Yang commented on HADOOP-7560:
-----------------------------------

Alejandro, the proposed approaches are two extreme models.  How about we have a sensible approach
to group top level modules and submodules?

For example:

{noformat}
trunk/
      hadopo-project/ (f)
      hadoop-common/ (f)
      hadoop-hdfs/ (h)
                       hadoop-hdfs-http-client/ (f) (this is hoop)
                       hadoop-hdfs-http-server/ (f) (this is hoop)
      hadoop-mapreduce/ (h) (*)
                       hadoop-mr-client/ (*)
                                        hadoop-mapreduce-client-app/
                                        hadoop-mapreduce-client-common/
                                        hadoop-mapreduce-client-core/
                                        hadoop-mapreduce-client-hs/
                                        hadoop-mapreduce-client-jobclient/
                                        hadoop-mapreduce-client-shuffle/                 
                     
                       hadoop-yarn/ (*)
                                   hadoop-yarn-api/
                                   hadoop-yarn-common/
                                   hadoop-yarn-server/
{noformat}

In the proposed format, the structure of the tree is driven by the context and importance
of the module.

IMHO, hadoop-project-dist, hadoop-assemblies, hadoop-annotations should not be modules.  They
are small plugins and can be grouped  as hadoop-project.  hadoop-auth should be part of hadoop-common.
 This will remove the noise for the project organization.

> Make hadoop-common a POM module with sub-modules (common & alfredo)
> -------------------------------------------------------------------
>
>                 Key: HADOOP-7560
>                 URL: https://issues.apache.org/jira/browse/HADOOP-7560
>             Project: Hadoop Common
>          Issue Type: Sub-task
>            Reporter: Alejandro Abdelnur
>            Assignee: Alejandro Abdelnur
>             Fix For: 0.23.0
>
>         Attachments: HADOOP-7560v1.patch, HADOOP-7560v1.sh
>
>
> Currently hadoop-common is a JAR module, thus it cannot aggregate sub-modules.
> Changing it to POM module it makes it an aggregator module, all the code under hadoop-common
must be moved to a sub-module.
> I.e.:
> mkdir hadoop-common-project
> mv hadoop-common hadoop-common-project
> mv hadoop-alfredo hadoop-common-project
> hadoop-common-project/pom.xml is a POM module that aggregates common & alfredo

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