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https://issues.apache.org/jira/browse/HBASE-6870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13462385#comment-13462385
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chunhui shen commented on HBASE-6870:
-------------------------------------
@Andrew
First, we will also use cached location without this patch, see the details
through
HConnectionImplementation#processExecs->ExecRPCInvoker#invoke
Second, if cached location is wrong, processExecs also will retry , also see
the details in the ExecRPCInvoker#invoke
Third, if one parent region is split when processExecs, current logic will
cause the result incorrect, I will upload the patch to fix this bug after test
in our environment
At last, this patch is mainly in order to increase the performance for
processExecs, I could provide the performance test later.
> HTable#coprocessorExec always scan the whole table
> ---------------------------------------------------
>
> Key: HBASE-6870
> URL: https://issues.apache.org/jira/browse/HBASE-6870
> Project: HBase
> Issue Type: Improvement
> Components: Coprocessors
> Affects Versions: 0.94.1
> Reporter: chunhui shen
> Assignee: chunhui shen
> Attachments: HBASE-6870.patch, HBASE-6870v2.patch, HBASE-6870v3.patch
>
>
> In current logic, HTable#coprocessorExec always scan the whole table, its
> efficiency is low and will affect the Regionserver carrying .META. under
> large coprocessorExec requests
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