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https://issues.apache.org/jira/browse/HBASE-3416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12989680#comment-12989680
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stack commented on HBASE-3416:
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+1 We do this all over the place to get a test in. When we rewrite it all,
we'll do it so you don't have to do such hackery.
> For intra-row scanning, the update readers notification resets the query
> matcher and can lead to incorrect behavior
> -------------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-3416
> URL: https://issues.apache.org/jira/browse/HBASE-3416
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 0.90.0
> Reporter: Jonathan Gray
> Fix For: 0.90.1
>
> Attachments: HBASE-3416.patch
>
>
> In {{StoreScanner.resetScannerStack()}}, which is called on the first
> {{next()}} call after readers have been updated, we do a query matcher reset.
> Normally this is not an issue because the query matcher does not need to
> maintain state between rows. However, if doing intra-row scanning w/ the
> specified limit, we could have the query matcher reset in the middle of
> reading a row. This could lead to incorrect behavior (too many versions
> coming back, etc).
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