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https://issues.apache.org/jira/browse/HBASE-1724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12737078#action_12737078
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Jean-Daniel Cryans commented on HBASE-1724:
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This is already fixed in branch 0.19 and trunk. Please either fetch the latest
in your branch from SVN or try out the new release candidate for 0.20
http://people.apache.org/~stack/hbase-0.20.0-candidate-1/
> Data loss after `kill -9` region server
> ---------------------------------------
>
> Key: HBASE-1724
> URL: https://issues.apache.org/jira/browse/HBASE-1724
> Project: Hadoop HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 0.19.3
> Environment: OpenSUSE 11.1, HBase 0.19.3, Hadoop HDFS 0.19.1
> Reporter: Kirill Balyasnikov
> Attachments: log_fragment.txt
>
>
> I have a 3 node cluster setup each running hadoop and hbase. I have created
> 'accounts' table and loaded some data into it (about 3000 rows).
> Some days later one of the region servers died and after i restarted it there
> were no records in the table at all. I saw HLOG file with my records
> in HDFS but as I understand the file was not used by HBase to recover the
> table.
> I tried to emulate the situation and uploaded another 2000 records into my
> table and killed the region server holding 'accounts' table region.
> In the HDFS I found file with my records but some time later it was replaced
> by another empty directory. As i suspected after killed region
> server startup the data was not recovered.
> Everything is lost again and there is no any exceptions in the logs...
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