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Posted to issues@hbase.apache.org by "Duo Zhang (JIRA)" <ji...@apache.org> on 2018/12/05 09:58:00 UTC

[jira] [Commented] (HBASE-21550) Should allow returning a modified TableDescriptor for MasterObserver.preCreateTable

    [ https://issues.apache.org/jira/browse/HBASE-21550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16709851#comment-16709851 ] 

Duo Zhang commented on HBASE-21550:
-----------------------------------

Oh, maybe a new method, which is called preCreateTableRegionInfos, which is allowed to modify the table descriptor.

> Should allow returning a modified TableDescriptor for MasterObserver.preCreateTable
> -----------------------------------------------------------------------------------
>
>                 Key: HBASE-21550
>                 URL: https://issues.apache.org/jira/browse/HBASE-21550
>             Project: HBase
>          Issue Type: Bug
>          Components: Coprocessors
>            Reporter: Duo Zhang
>            Priority: Major
>             Fix For: 3.0.0, 2.2.0
>
>
> 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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