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https://issues.apache.org/jira/browse/YARN-5667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15677340#comment-15677340
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Haibo Chen commented on YARN-5667:
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My first version of the patch is actually created for trunk. Based on that
experience, it should be manageable to create one for trunk and another for
yarn-5355. To make things easier and move quicker, I'll break this change into
a few pieces and create a subtask for each of them.
> Move HBase backend code in ATS v2 into its separate module
> -----------------------------------------------------------
>
> Key: YARN-5667
> URL: https://issues.apache.org/jira/browse/YARN-5667
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: yarn
> Affects Versions: 3.0.0-alpha1
> Reporter: Haibo Chen
> Assignee: Haibo Chen
> Priority: Blocker
> Attachments: New module structure.png, part1.yarn5667.prelim.patch,
> part2.yarn5667.prelim.patch, part3.yarn5667.prelim.patch,
> part4.yarn5667.prelim.patch, part5.yarn5667.prelim.patch,
> pt1.yarn5667.001.patch, pt2.yarn5667.001.patch, pt3.yarn5667.001.patch,
> pt4.yarn5667.001.patch, pt5.yarn5667.001.patch, pt6.yarn5667.001.patch,
> pt9.yarn5667.001.patch, yarn5667-001.tar.gz
>
>
> The HBase backend code currently lives along with the core ATS v2 code in
> hadoop-yarn-server-timelineservice module. Because Resource Manager depends
> on hadoop-yarn-server-timelineservice, an unnecessary dependency of the RM
> module on HBase modules is introduced (HBase backend is pluggable, so we do
> not need to directly pull in HBase jars).
> In our internal effort to try ATS v2 with HBase 2.0 which depends on Hadoop
> 3, we encountered a circular dependency during our builds between HBase2.0
> and Hadoop3 artifacts.
> {code}
> hadoop-mapreduce-client-common, hadoop-yarn-client,
> hadoop-yarn-server-resourcemanager, hadoop-yarn-server-timelineservice,
> hbase-server, hbase-prefix-tree, hbase-hadoop2-compat,
> hadoop-mapreduce-client-jobclient, hadoop-mapreduce-client-common]
> {code}
> This jira proposes we move all HBase-backend-related code from
> hadoop-yarn-server-timelineservice into its own module (possible name is
> yarn-server-timelineservice-storage) so that core RM modules do not depend on
> HBase modules any more.
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