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https://issues.apache.org/jira/browse/HBASE-18893?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16215773#comment-16215773
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Mike Drob commented on HBASE-18893:
-----------------------------------
Test failures appear unrelated.
> Remove Add/Modify/DeleteColumnFamilyProcedure in favor of using
> ModifyTableProcedure
> ------------------------------------------------------------------------------------
>
> Key: HBASE-18893
> URL: https://issues.apache.org/jira/browse/HBASE-18893
> Project: HBase
> Issue Type: Bug
> Components: Coprocessors, master
> Reporter: Mike Drob
> Assignee: Mike Drob
> Fix For: 2.0.0-alpha-4
>
> Attachments: HBASE-18893.patch, HBASE-18893.v2.patch,
> HBASE-18893.v3.patch, HBASE-18893.v4.patch
>
>
> The shell changed from using separate add/modify/delete column calls to
> funneling everything through modify table for performance reasons. We know
> that using modify table works for everything. Let's drop the old code for
> Add/Modify/Delete Column so that we have a lower maintenance burden and fewer
> code paths to reason about.
> -------- Was: shell 'alter' command no longer distinguishes column
> add/modify/delete
> After HBASE-15641 all 'alter' commands go through a single modifyTable call
> at the end, so we no longer can easily distinguish add, modify, and delete
> column events. This potentially affects coprocessors that needed the update
> notifications for new or removed columns.
> Let's let the shell still make separate behaviour calls like it did before
> without undoing the batching that seems pretty useful.
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