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From "Esteban Gutierrez (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6094) Update the coprocessor to be a dynamically loaded one
Date Thu, 19 Jan 2017 22:31:26 GMT

    [ https://issues.apache.org/jira/browse/YARN-6094?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15830722#comment-15830722
] 

Esteban Gutierrez commented on YARN-6094:
-----------------------------------------

I don't thin thats necessary, our HBase {{hfile.format.version}} has been bumped since HBase
0.98 to use HFileV3 by default. However we do still carry some tests that programmatically
pass that value before stating the HBase minicluster.  Some distributions might have opted
to ship revert to the old HFile version due some compat requirements but as long is documented
that the Timeline Service needs to use tags and is expected that {{hfile.format.version}}
is using the default of 3 I don't see any problem. 

> Update the coprocessor to be a dynamically loaded one
> -----------------------------------------------------
>
>                 Key: YARN-6094
>                 URL: https://issues.apache.org/jira/browse/YARN-6094
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Vrushali C
>            Assignee: Vrushali C
>              Labels: yarn-5355-merge-blocker
>         Attachments: YARN-6094.001.patch, YARN-6094-YARN-5355.001.patch, YARN-6094-YARN-5355.002.patch,
YARN-6094-YARN-5355.003.patch, YARN-6094-YARN-5355.004.patch
>
>
> The timeline service v2 code base on yarn now uses hbase 1.2.4 after YARN-5976. 
> With this version of hbase, system classes (starting with org.apache.hadoop) can be loaded
as table level coprocessors. Hence we should update the timeline service coprocessor to be
a dynamically loaded one instead of static loading. 
> This involves code changes as well as documentation updates for deployment.



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