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Date: Wed, 26 Aug 2009 01:03:59 -0700 (PDT)
From: "Mathias Herberts (JIRA)" <jira@apache.org>
To: hbase-dev@hadoop.apache.org
Subject: [jira] Commented: (HBASE-1784) Missing rows after medium intensity
 insert
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    [ https://issues.apache.org/jira/browse/HBASE-1784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12747820#action_12747820 ] 

Mathias Herberts commented on HBASE-1784:
-----------------------------------------

A scan of the table shows that rows from the region 0TE181121109t\x90_\x7F\xFF\xFF\xFE,1251257023139 whose compaction failed are indeed gone, so this clearly shows that missing rows are indeed linked to the failed compaction.

> Missing rows after medium intensity insert
> ------------------------------------------
>
>                 Key: HBASE-1784
>                 URL: https://issues.apache.org/jira/browse/HBASE-1784
>             Project: Hadoop HBase
>          Issue Type: Bug
>    Affects Versions: 0.20.0
>            Reporter: Jean-Daniel Cryans
>            Priority: Blocker
>         Attachments: DataLoad.java, HBASE-1784.log
>
>
> This bug was uncovered by Mathias in his mail "Issue on data load with 0.20.0-rc2". Basically, somehow, after a medium intensity insert a lot of rows goes missing. Easy way to reproduce : PE. Doing a PE scan or randomRead afterwards won't uncover anything since it doesn't bother about null rows. Simply do a count in the shell, easy to test (I changed my scanner caching in the shell to do it faster).
> I tested some light insertions with force flush/compact/split in the shell and it doesn't break.

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