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https://issues.apache.org/jira/browse/HBASE-16296?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15402152#comment-15402152
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Sean Busbey commented on HBASE-16296:
-------------------------------------
I'd rather a release note / known issue calling out the edge case where things
fall over than change behavior in a maintenance release, but I don't have time
to review the specifics of this case and I trust y'all to make a call on the
tradeoff wrt severity.
> Reverse scan performance degrades when scanner cache size matches page filter
> size
> ----------------------------------------------------------------------------------
>
> Key: HBASE-16296
> URL: https://issues.apache.org/jira/browse/HBASE-16296
> Project: HBase
> Issue Type: Bug
> Reporter: James Taylor
> Attachments: 16296-MAYBE-v2.txt, 16296-MAYBE.txt, PAgefilter.patch,
> generatedata-snippet.java, repro-snippet.java
>
>
> When a reverse scan is done, the server seems to not know it's done when the
> scanner cache size matches the number of rows in a PageFilter. See
> PHOENIX-3121 for how this manifests itself. We have a standalone, pure HBase
> API reproducer too that I'll attach (courtesy of [~churromorales] and
> [~mujtabachohan]).
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