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https://issues.apache.org/jira/browse/PHOENIX-4053?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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James Taylor updated PHOENIX-4053:
----------------------------------
    Attachment: PHOENIX-4053_v2.patch

Here's a patch with a test ConcurrentMutationsIT.testLockUntilMVCCAdvanced that 
repros the issue (by waiting in postBatchMutate) and includes a fix - locking 
rows until after mvcc is advanced.

Please take a look, [~samarthjain] & [~vincentpoon].

> Lock row exclusively when necessary for mutable secondary indexing
> ------------------------------------------------------------------
>
>                 Key: PHOENIX-4053
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-4053
>             Project: Phoenix
>          Issue Type: Bug
>            Reporter: James Taylor
>            Assignee: James Taylor
>         Attachments: PHOENIX-4053_v2.patch, PHOENIX-4053_wip.patch
>
>
> From HBase 1.2 on, rows are not exclusively locked when the preBatchMutate 
> call is made (see HBASE-18474). The mutable secondary index (global and 
> local) depend on this to get a consistent snapshot of a row between the point 
> when the current row value is looked up, and when the new row is written.



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