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From "Nick Dimiduk (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13473) deleted cells come back alive after the stripe compaction
Date Wed, 15 Apr 2015 16:39:59 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14496480#comment-14496480

Nick Dimiduk commented on HBASE-13473:

hi [~eomiks], thanks for the patch. I've pressed the "submit patch" button, which will allow
it to be picked up by our test infrastructure. Would you mind providing a test that demonstrates
the current failure, and is fixed by your patch? Thanks.

> deleted cells come back alive after the stripe compaction
> ---------------------------------------------------------
>                 Key: HBASE-13473
>                 URL: https://issues.apache.org/jira/browse/HBASE-13473
>             Project: HBase
>          Issue Type: Bug
>          Components: Compaction
>    Affects Versions: 2.0.0, 1.0.1, 1.1.0, 0.98.12
>            Reporter: jeongmin kim
>            Assignee: jeongmin kim
>            Priority: Blocker
>              Labels: patch
>         Attachments: HBASE-13473.patch
> during the STRIPE compaction,
> deletes(tombstones) are being dropped in 2 cases.
> 1. Compaction including L0  (includeL0 == true)
> 2. L0 has no files (canDropDeletesWithoutL0 == true)
> To drop delete marker and keep the consistency during compaction, 
> All of HFiles in the stripe has to be selected, just like major compaction.
> otherwise, after the compaction only delete markers would be gone, 
> and deleted cells (which is in the not-selected HFiles) are going to be alive again.
> In my cluster, there was no file on L0(canDropDeletesWithoutL0==true) and not all files
are selected for compaction, so some of deleted rows have come back alive and appears when
i get or scan after compactions.
> I made a patch about it.
> it checks if all files are selected before we set the majorRange of compaction request

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