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https://issues.apache.org/jira/browse/HBASE-1784?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12746983#action_12746983
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Jonathan Gray commented on HBASE-1784:
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Current thinking is that this is caused by failed compaction(s). Mathias is
turning on DEBUG and running smaller jobs, increasing load each run, until it
triggers missing rows.
> 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
>
>
> 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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