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https://issues.apache.org/jira/browse/HBASE-21659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16743532#comment-16743532
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Guanghao Zhang commented on HBASE-21659:
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[~stack] If enable it default, this behavior will not same with the old impl.
Mark this as incompatiable change to enable this? And this should be apply to
branch-2.0 and branch-2.1, too?
> Avoid to load duplicate coprocessors in system config and table descriptor
> --------------------------------------------------------------------------
>
> Key: HBASE-21659
> URL: https://issues.apache.org/jira/browse/HBASE-21659
> Project: HBase
> Issue Type: Improvement
> Reporter: Guanghao Zhang
> Assignee: Guanghao Zhang
> Priority: Minor
> Fix For: 3.0.0, 1.5.0, 2.2.0
>
> Attachments: HBASE-21659.master.001.patch,
> HBASE-21659.master.002.patch, HBASE-21659.master.003.patch,
> HBASE-21659.master.004.patch
>
>
> When there are same coprocessor in system coprocessor config and table
> descriptor. It will load the coprocessor twice and the coprocessor method may
> run twice, too. It should avoid to load duplicate coprocessors.
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