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From "Jean-Marc Spaggiari (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9648) collection one expired storefile causes it to be replaced by another expired storefile
Date Tue, 24 Sep 2013 18:18:02 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13776583#comment-13776583
] 

Jean-Marc Spaggiari commented on HBASE-9648:
--------------------------------------------

Is the region really empty? From the logs provided by the user we can see this:
{code}
size=491.0; total size for store is 5.7m
{code}

491 bytes is very small, I agree, but might not be totally empty.
                
> 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
>
> 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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