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https://issues.apache.org/jira/browse/YARN-7346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16352187#comment-16352187
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Rohith Sharma K S commented on YARN-7346:
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Update : As we discussed in last ATSv2 weekly call([~haibochen] [~vrushalic]
[~varun_saxena]), decided to support conditional compilation so that ATSv2
should support hbase-1.2.6 which is already release along with Hadoop GA and
HBase-2 as well. Currently all the hbase code are embedded in single jar. To
support conditional compilation, straight forward approach is create another
module which picks up if Hbase version is 2.0. But issue with this approach is
duplicated code exist on both modules.
After further discussion, we also thought of splitting into multiple jars such
as *hadoop-yarn-server-timelineservice-hbase-common.jar*
*hadoop-yarn-server-timelineservice-hbase-reader.jar*
*hadoop-yarn-server-timelineservice-hbase-collector.jar* so that HBase
co-processor code resides on collector jar which has co-processor
modifications. Doing this brings out we can create any number of module for
collectors if HBase changes any APIs.
But cons from this approach is how does existing upgrade is handled? We also
need to analyze running HBase with older timelineservice co processor jar and
collector running with newer jars causes any issue provided we still maintain
same class names.
[~haibochen] [~vrushalic] feel free to add more point if I have missed any.
> Fix compilation errors against hbase2 beta release
> --------------------------------------------------
>
> Key: YARN-7346
> URL: https://issues.apache.org/jira/browse/YARN-7346
> Project: Hadoop YARN
> Issue Type: Sub-task
> Reporter: Ted Yu
> Assignee: Vrushali C
> Priority: Major
> Attachments: YARN-7346.00.patch, YARN-7346.01.patch,
> YARN-7346.prelim1.patch, YARN-7346.prelim2.patch, YARN-7581.prelim.patch
>
>
> When compiling hadoop-yarn-server-timelineservice-hbase against 2.0.0-alpha3,
> I got the following errors:
> https://pastebin.com/Ms4jYEVB
> This issue is to fix the compilation errors.
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