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https://issues.apache.org/jira/browse/HBASE-12183?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14170160#comment-14170160
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Nick Dimiduk commented on HBASE-12183:
--------------------------------------
Any filter that implements the nextCell optimization is probably not supporting
reversed scans, that's true. I don't think anyone has done an audit of the
implementations.
> FuzzyRowFilter doesn't support reverse scans
> --------------------------------------------
>
> Key: HBASE-12183
> URL: https://issues.apache.org/jira/browse/HBASE-12183
> Project: HBase
> Issue Type: Bug
> Components: Filters
> Reporter: Nick Dimiduk
> Assignee: Nick Dimiduk
> Fix For: 2.0.0, 0.98.8, 0.99.1
>
> Attachments: 12183.patch, HBASE-12183.00-0.98.patch,
> HBASE-12183.00-0.99.patch, HBASE-12183.00.patch, HBASE-12183.01-0.98.patch,
> HBASE-12183.01-0.99.patch, HBASE-12183.01.patch
>
>
> Try using the FuzzyRowFilter with a reversed scanner and you'll get an RPC
> timeout. Looking at the code, this filter ignores the reversed flag and
> always move forward when calculating the value of getNextCellHint.
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