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From "Kirill Balyasnikov (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-1724) Data loss after `kill -9` region server
Date Thu, 30 Jul 2009 12:15:14 GMT

     [ https://issues.apache.org/jira/browse/HBASE-1724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kirill Balyasnikov updated HBASE-1724:
--------------------------------------

    Attachment: log_fragment.txt

I have attached a log fragment after region server killed. 192.168.0.220 is killed server.
192.168.0.222 is a new server holding 'accounts' table region.

> 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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