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https://issues.apache.org/jira/browse/PHOENIX-3925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16644042#comment-16644042
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Vincent Poon commented on PHOENIX-3925:
---------------------------------------
Updated website documentation to this:
"Global indexes on columns being atomically updated are not supported, as
potentially a separate RPC across the wire would be made while the row is under
lock to maintain the secondary index."
> Disallow usage of ON DUPLICATE KEY clause on tables with global secondary
> indexes
> ---------------------------------------------------------------------------------
>
> Key: PHOENIX-3925
> URL: https://issues.apache.org/jira/browse/PHOENIX-3925
> Project: Phoenix
> Issue Type: Bug
> Reporter: James Taylor
> Assignee: James Taylor
> Priority: Major
> Fix For: 4.11.0
>
> Attachments: PHOENIX-3925.patch
>
>
> For the reasons of service protection, rather than just documenting that you
> shouldn't use the ON DUPLICATE KEY clause on tables with global secondary
> indexes, we should instead throw an exception if this is attempted. See
> reasons listed here for the reason:
> https://phoenix.apache.org/atomic_upsert.html#Limitations
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