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https://issues.apache.org/jira/browse/HBASE-19122?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16227117#comment-16227117
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Anoop Sam John commented on HBASE-19122:
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We can better move this issue as subtask under that CP cleanup jira?
> preCompact and preFlush can bypass by returning null scanner; shut it down
> --------------------------------------------------------------------------
>
> Key: HBASE-19122
> URL: https://issues.apache.org/jira/browse/HBASE-19122
> Project: HBase
> Issue Type: Bug
> Components: Coprocessors, Scanners
> Reporter: stack
> Priority: Critical
> Fix For: 2.0.0-beta-1
>
>
> Noticed by [~anoop.hbase] during review of HBASE-18770, preCompact and
> preFlush can bypass normal processing by returning null. They are not
> bypasable by ordained route. We should shut down this avenue.
> The preCompact at least may be new coming in with:
> {code}
> tree dbf13093842f85a713f023d7219caccf8f4eb05f
> parent a4dcf51415616772e462091ce93622f070ea8810
> author zhangduo <zhang...@apache.org> Sat Apr 9 16:18:08 2016 +0800
> committer zhangduo <zhang...@apache.org> Sun Apr 10 09:26:28 2016 +0800
> HBASE-15527 Refactor Compactor related classes
> {code}
> Would have to dig in more to figure for sure.
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