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Date: Fri, 20 Jan 2017 17:55:26 +0000 (UTC)
From: "Haibo Chen (JIRA)" <jira@apache.org>
To: yarn-issues@hadoop.apache.org
Message-ID: <JIRA.13007476.1474860540000.64990.1484934926959@Atlassian.JIRA>
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Subject: [jira] [Resolved] (YARN-5667) Move HBase backend code in ATS v2
  into its separate module
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archived-at: Fri, 20 Jan 2017 17:55:34 -0000


     [ https://issues.apache.org/jira/browse/YARN-5667?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Haibo Chen resolved YARN-5667.
------------------------------
    Resolution: Done

> 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: 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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