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https://issues.apache.org/jira/browse/HBASE-910?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12640882#action_12640882
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stack commented on HBASE-910:
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Good one Jim for digging in.
Don't you think it critical that we fix the hole Jim? That it become a
blocker? Otherwise, scanners get different view of the data dependent upon
when they run?
> Scanner misses columns / rows when the scanner is obtained durring a memcache
> flush
> -----------------------------------------------------------------------------------
>
> Key: HBASE-910
> URL: https://issues.apache.org/jira/browse/HBASE-910
> Project: Hadoop HBase
> Issue Type: Bug
> Components: regionserver
> Environment: latest trunk
> Reporter: Clint Morgan
> Priority: Critical
> Attachments: hbase-910.patch
>
>
> I first noticed that some columns for a row were missing if they are coming
> from a scanner that was obtained while a memecache flush on the region was in
> progress. I tried to write a simple unit test to reproduce, however the
> problem I get in the unit test is that some rows are being missed.
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