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https://issues.apache.org/jira/browse/HBASE-21550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16710543#comment-16710543
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stack commented on HBASE-21550:
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Do we need it in branch-2.1 or branch-2.0? Lets do without backport if we can.
Otherwise, +1 on patch for branch-2+.
> Add a new method preCreateTableRegionInfos for MasterObserver which allows
> CPs to modify the TableDescriptor
> ------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-21550
> URL: https://issues.apache.org/jira/browse/HBASE-21550
> Project: HBase
> Issue Type: Bug
> Components: Coprocessors
> Reporter: Duo Zhang
> Assignee: Duo Zhang
> Priority: Major
> Fix For: 3.0.0, 2.2.0
>
> Attachments: HBASE-21550.patch
>
>
> Before 2.0, we will pass a HTableDescriptor and the CPs can modify the schema
> of a table, but now we will pass a TableDescriptor, which is immutable. I
> think it is correct to pass an immutable instance here, but we should have a
> return value for this method to allow CPs to return a new TableDescriptor.
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