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https://issues.apache.org/jira/browse/PHOENIX-2635?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15149030#comment-15149030
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Thomas D'Silva commented on PHOENIX-2635:
-----------------------------------------
+1
> Partial index rebuild doesn't work for mutable data
> ---------------------------------------------------
>
> Key: PHOENIX-2635
> URL: https://issues.apache.org/jira/browse/PHOENIX-2635
> Project: Phoenix
> Issue Type: Bug
> Reporter: James Taylor
> Assignee: James Taylor
> Fix For: 4.7.0
>
> Attachments: PHOENIX-2635.patch, PHOENIX-2635_addendum.patch,
> PHOENIX-2635_v2.patch, PHOENIX-2635_v3.patch
>
>
> The partial rebuild index feature for mutable secondary indexes does not do
> the correct index maintenance. We currently only insert the new index rows
> based on the current data row values which would not correctly remove the
> previous index row (thus leading to an invalid index). Instead, we should
> replay the data row mutations so that the coprocessors generate the correct
> deletes and updates.
> Also, instead of *every* region running the partial index rebuild, we should
> have each region only replay their own data mutations so that we're not
> duplicating work.
> A third (and perhaps most serious) issue is that the partial index rebuild
> could trigger the upgrade code before a cluster is ready to be upgraded.
> We'll definitely want to prevent that.
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