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From "Jean-Daniel Cryans (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1724) Data loss after `kill -9` region server
Date Thu, 30 Jul 2009 12:17:14 GMT

    [ 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:
-------------------------------------------

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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