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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13473) deleted cells come back alive after the stripe compaction
Date Thu, 16 Apr 2015 18:55:59 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13473?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14498509#comment-14498509

Hadoop QA commented on HBASE-13473:

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  against master branch at commit ddab4726f6675943fc31b697a3d974bab74cd9ec.
  ATTACHMENT ID: 12725903

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 3 new or modified

    {color:green}+1 hadoop versions{color}. The patch compiles with all supported hadoop versions
(2.4.1 2.5.2 2.6.0)

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 protoc{color}.  The applied patch does not increase the total number of
protoc compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 checkstyle{color}.  The applied patch does not increase the total number
of checkstyle errors

    {color:green}+1 findbugs{color}.  The patch does not introduce any  new Findbugs (version
2.0.3) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 lineLengths{color}.  The patch does not introduce lines longer than 100

  {color:green}+1 site{color}.  The mvn site goal succeeds with this patch.

    {color:green}+1 core tests{color}.  The patch passed unit tests in .

Test results: https://builds.apache.org/job/PreCommit-HBASE-Build/13722//testReport/
Release Findbugs (version 2.0.3) 	warnings: https://builds.apache.org/job/PreCommit-HBASE-Build/13722//artifact/patchprocess/newFindbugsWarnings.html
Checkstyle Errors: https://builds.apache.org/job/PreCommit-HBASE-Build/13722//artifact/patchprocess/checkstyle-aggregate.html

  Console output: https://builds.apache.org/job/PreCommit-HBASE-Build/13722//console

This message is automatically generated.

> 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
>             Fix For: 2.0.0, 1.0.1, 1.1.0, 0.98.13
>         Attachments: HBASE-13473.patch, HBASE_13473-v2.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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