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https://issues.apache.org/jira/browse/HBASE-18649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16180186#comment-16180186
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stack commented on HBASE-18649:
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bq. The branch-2 code will be made to work with MapReduceCell only and we can
mark things as incompatible change.
So, a MR job that is from branch-1 going against a branch-2 cluster will fail?
I think that violates our attempt at making it so a branch-1 client can work
against a branch-2 cluster? What you think [~ram_krish] Does MR have to be
incompatible?
But it seems that this is case only for some types of custom MR jobs and that
majority will keep working? What you think?
> Deprecate KV Usage in MR to move to Cells in 3.0
> ------------------------------------------------
>
> Key: HBASE-18649
> URL: https://issues.apache.org/jira/browse/HBASE-18649
> Project: HBase
> Issue Type: Improvement
> Components: mapreduce
> Affects Versions: 2.0.0-alpha-2
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Fix For: 2.0.0, 3.0.0, 2.1.0, 2.0.0-alpha-4
>
> Attachments: HBASE-18649_branch-2.patch, HBASE-18649_master_2.patch,
> HBASE-18649_master_3.patch, HBASE-18649_master_5.patch,
> HBASE-18649_master_6.patch, HBASE-18649_master.patch
>
>
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