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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12065) Import tool is not restoring multiple DeleteFamily markers of a row
Date Wed, 24 Sep 2014 14:32:35 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12065?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14146371#comment-14146371
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Anoop Sam John commented on HBASE-12065:
----------------------------------------

bq.If you pass multiple DeleteFamily markers of a row in a single Delete request to hbase
then table is maintaining only one. 
multiple DeleteFamily markers of a row for same family.  Yes then we consider only the newest
one added. So the order in which it was added matters.  You will need to deal with this in
the tool then.

>  Import tool is not restoring multiple DeleteFamily markers of a row
> --------------------------------------------------------------------
>
>                 Key: HBASE-12065
>                 URL: https://issues.apache.org/jira/browse/HBASE-12065
>             Project: HBase
>          Issue Type: Bug
>          Components: util
>    Affects Versions: 0.98.2
>            Reporter: Maddineni Sukumar
>            Assignee: Maddineni Sukumar
>            Priority: Minor
>         Attachments: hbase-12065-fix.patch, hbase-12065-unit-test.patch
>
>
> When a row has more than one DeleteFamily markers, Import tool is not restoring all DeleteFamily
markers. 
> Scenario: Insert entries into hbase in below order
> Put Row1 with Value-A
> Delete Row1 with DeleteFamily Marker
> Put Row1 with Value-B
> Delete Row1 with DeleteFamily Marker
> Using Export tool export this data and Import it into another table, you will see below
entries
> Delete Row1 with DeleteFamily Marker
> Put Row1 with Value-B
> Put Row1 with Value-A
> One DeleteFamily marker is missing here... In Import tool, Importer.writeResult() method
we are batching all deletes into a single Delete request and pushing into hbase. Here we are
pushing only one delete family marker into hbase table.
> I tried same with normal HTable.delete command also. 
> If you pass multiple DeleteFamily markers of a row in a single Delete request to hbase
then table is maintaining only one. 
> If that is the expected  behavior of hbase then we should change logic in Import tool
to push DeleteFamily markers individually one by one.



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