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https://issues.apache.org/jira/browse/HBASE-21560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16711421#comment-16711421
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Duo Zhang commented on HBASE-21560:
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+1.
> Return a new TableDescriptor for MasterObserver#preModifyTable to allow
> coprocessor modify the TableDescriptor
> --------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-21560
> URL: https://issues.apache.org/jira/browse/HBASE-21560
> Project: HBase
> Issue Type: Improvement
> Reporter: Guanghao Zhang
> Priority: Major
>
> Same with HBASE-21550. The new TableDescriptor is immutable for 2.0+. But in
> our use case, the coprocessor may change the TableDescriptor when
> preModifyTable. It is allowed before 2.0. For 2.0+, We can return a new
> TableDescriptor for MasterObserver#preModifyTable to allow this.
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