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https://issues.apache.org/jira/browse/PHOENIX-3789?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15969506#comment-15969506
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Andrew Purtell commented on PHOENIX-3789:
-----------------------------------------

FWIW, after HBASE-17210 at least rowlock acquisition on the blocked primary 
rows for other clients attempting concurrent updates will fail according to RPC 
timeout not the expensive 30 sec hardcoded value.

> Execute cross region index maintenance calls outside of row lock
> ----------------------------------------------------------------
>
>                 Key: PHOENIX-3789
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-3789
>             Project: Phoenix
>          Issue Type: Bug
>            Reporter: James Taylor
>            Assignee: James Taylor
>             Fix For: 4.11.0, 4.10.1
>
>         Attachments: PHOENIX-3789.patch
>
>
> Making cross region server calls while the row is locked can lead to a 
> greater chance of resource starvation. We can use the 
> postBatchMutateIndispensably hook instead of the postBatchMutate call for our 
> processing.



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