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https://issues.apache.org/jira/browse/YARN-5667?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15547147#comment-15547147
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Haibo Chen commented on YARN-5667:
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I have run all ATS-v2 unit tests, and deployed this into a pseudo-distributed
cluster to run an example mapreduce job to verify this change does not break
functionalities. [~vrushalic], [~sjlee0], Do you have any suggestion on how to
further test this change?
However, there is still one piece that is missing here, that is, copying hbase
jars into the share/hadoop/yarn/lib directory at packaging time. For some
reason, the hadoop-specific maven assembly plugin (I believe it is
hadoop-yarn-dist.xml) no longer detects the hbase dependency in the new module,
which was previously in the timelineservice module. [~sjlee0] What I am missing?
> 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
> Reporter: Haibo Chen
> Assignee: Haibo Chen
> Attachments: part1.yarn5667.prelim.patch,
> part2.yarn5667.prelim.patch, part3.yarn5667.prelim.patch,
> part4.yarn5667.prelim.patch, part5.yarn5667.prelim.patch
>
>
> 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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