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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-7740) Recheck matching row for joined scanners
Date Sat, 02 Feb 2013 02:01:12 GMT

    [ https://issues.apache.org/jira/browse/HBASE-7740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13569376#comment-13569376
] 

Lars Hofhansl commented on HBASE-7740:
--------------------------------------

Nice find. +1
(Not that I am happy with adding another comparison into a relatively hot code path, but I
do not see how this is avoidable)

                
> Recheck matching row for joined scanners
> ----------------------------------------
>
>                 Key: HBASE-7740
>                 URL: https://issues.apache.org/jira/browse/HBASE-7740
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>             Fix For: 0.96.0, 0.94.5
>
>         Attachments: HBASE-7740-v0.patch
>
>
> It just occured to me that when the patch in HBASE-5416 was being modified by various
people, the pre-check was changed to post-check in populateResults. Whereas before that, noting
that there's a pre-check, I removed the check we do between seek and populateResult elsewhere
(joined scanner path only).
> I have not observed this bug, but it seems to exist.

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