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https://issues.apache.org/jira/browse/HBASE-476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12581139#action_12581139
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Jim Kellerman commented on HBASE-476:
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Is this still an issue in the HBase release candidate?
> RegexpRowFilter behaves incorectly when there are multiple store files
> ----------------------------------------------------------------------
>
> Key: HBASE-476
> URL: https://issues.apache.org/jira/browse/HBASE-476
> Project: Hadoop HBase
> Issue Type: Bug
> Components: filters
> Reporter: Clint Morgan
> Attachments: hbase-476-test.log, hbase-476-test.patch,
> hbase-476-test2.patch
>
>
> I noticed that after running some table Map/Reduces, then using a
> RegExpRowFilter to scan through the table, the scanner misses
> rows when its columns are in different stores.
> This (rather convoluted) unit test provokes the behavior.
> - Set memcache flush size small to trigger multiple stores
> - put in 10 row with 2 columns. Each row has the same value for col1 (which
> the RowFilter wants to match)
> - Scan with and without the filter to be sure that we get all the rows with
> each
> - Run an identity table M/R 10 times to fill up the memcache and trigger
> flush.
> - Scan again. This time the filter does not pickup anything.
> Attaching the log from this run as well.
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