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https://issues.apache.org/jira/browse/HBASE-9648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13847970#comment-13847970
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Sergey Shelukhin commented on HBASE-9648:
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The scanner created by coproc can hypothetically do anything. Actually I am
kind of ambivalent on that one. Maybe we should just document it, I suspect
coprocs usually don't generate new KVs out of no input KVs.
But, is it difficult to create writer on first entry? If it's easy, any reason
to not do it?
> collection one expired storefile causes it to be replaced by another expired
> storefile
> --------------------------------------------------------------------------------------
>
> Key: HBASE-9648
> URL: https://issues.apache.org/jira/browse/HBASE-9648
> Project: HBase
> Issue Type: Bug
> Components: Compaction
> Reporter: Sergey Shelukhin
> Assignee: Jean-Marc Spaggiari
> Attachments: HBASE-9648-v0-0.94.patch, HBASE-9648-v0-trunk.patch,
> HBASE-9648-v1-trunk.patch, HBASE-9648-v2-trunk.patch, HBASE-9648.patch
>
>
> There's a shortcut in compaction selection that causes the selection of
> expired store files to quickly delete.
> However, there's also the code that ensures we write at least one file to
> preserve seqnum. This new empty file is "expired", because it has no data,
> presumably.
> So it's collected again, etc.
> This affects 94, probably also 96.
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