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https://issues.apache.org/jira/browse/HDFS-6200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14349483#comment-14349483
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Haohui Mai commented on HDFS-6200:
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Here is the proposal for the first step:
Summary: (1) the changes are backward compatible, and (2) the changes will be
done in an incremental way to minimize risks.
* Update the pom.xml to create a new module {{hadoop-hdfs-client}} and publish
it into maven repository
* The old {{hadoop-hdfs}} jar depends on the {{hadoop-hdfs-client}} jar. There
should be no changes for downstream applications.
* Move the client implementation from {{hadoop-hdfs}} to {{hadoop-hdfs-client}}
incrementally. This can be done in trunk and be reviewed.
* Once the move is finished, we announce that the applications can depend on
{{hadoop-hdfs-client}} only.
* In this jira we left {{hadoop-common}} untouched. We'll take care of it in a
separate jira.
Thoughts?
> Create a separate jar for hdfs-client
> -------------------------------------
>
> Key: HDFS-6200
> URL: https://issues.apache.org/jira/browse/HDFS-6200
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Haohui Mai
> Assignee: Haohui Mai
> Attachments: HDFS-6200.000.patch, HDFS-6200.001.patch,
> HDFS-6200.002.patch, HDFS-6200.003.patch, HDFS-6200.004.patch,
> HDFS-6200.005.patch, HDFS-6200.006.patch, HDFS-6200.007.patch
>
>
> Currently the hadoop-hdfs jar contain both the hdfs server and the hdfs
> client. As discussed in the hdfs-dev mailing list
> (http://mail-archives.apache.org/mod_mbox/hadoop-hdfs-dev/201404.mbox/browser),
> downstream projects are forced to bring in additional dependency in order to
> access hdfs. The additional dependency sometimes can be difficult to manage
> for projects like Apache Falcon and Apache Oozie.
> This jira proposes to create a new project, hadoop-hdfs-cliient, which
> contains the client side of the hdfs code. Downstream projects can use this
> jar instead of the hadoop-hdfs to avoid unnecessary dependency.
> Note that it does not break the compatibility of downstream projects. This is
> because old downstream projects implicitly depend on hadoop-hdfs-client
> through the hadoop-hdfs jar.
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