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https://issues.apache.org/jira/browse/HBASE-18893?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mike Drob updated HBASE-18893:
------------------------------
Hadoop Flags: Incompatible change
Release Note:
The RPC calls for Add/Modify/DeleteColumn have been removed and are now backed
by ModifyTable functionality. The corresponding permissions in AccessController
have been removed as well.
The shell already bypassed these RPCs and used ModifyTable directly, and thus
would not be getting these permission checks, this change brings the rest of
the RPC inline with that.
Coprocessor hooks for pre/post Add/Modify/DeleteColumn have likewise been
removed. Coprocessors needing to take special actions on schema change should
instead process ModifyTable events (which they should have been doing already,
but it was easy for developers to miss this nuance).
RN updated.
> 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
>
>
> 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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