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https://issues.apache.org/jira/browse/HBASE-3198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12929802#action_12929802
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Kannan Muthukkaruppan commented on HBASE-3198:
----------------------------------------------

Nice catch. Good debugging...

> Log rolling archives files prematurely
> --------------------------------------
>
>                 Key: HBASE-3198
>                 URL: https://issues.apache.org/jira/browse/HBASE-3198
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Jean-Daniel Cryans
>            Assignee: Jean-Daniel Cryans
>            Priority: Blocker
>             Fix For: 0.90.0
>
>         Attachments: HBASE-3198_for_0.89.patch
>
>
> From the mailing list, Erdem Agaoglu found a case where when an HLog gets 
> rolled from the periodic log roller and it gets archived even tho the region 
> (ROOT) still has edits in the MemStore. I did an experiment on a local empty 
> machine and it does look broken:
> {noformat}
> org.apache.hadoop.hbase.regionserver.LogRoller: Hlog roll period 6000ms 
> elapsed
> org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogWriter: Using syncFs 
> -- HDFS-200
> org.apache.hadoop.hbase.regionserver.wal.HLog: Roll 
> /hbase-89-su/.logs/hbasedev,60020,1288977933643/10.10.1.177%3A60020.1288977933829,
>  entries=1,
>  filesize=295. New hlog 
> /hbase-89-su/.logs/hbasedev,60020,1288977933643/10.10.1.177%3A60020.1288977943913
> org.apache.hadoop.hbase.regionserver.wal.HLog: Found 1 hlogs to remove  out 
> of total 1; oldest outstanding sequenceid is 270055 from region -ROOT-,,0
> org.apache.hadoop.hbase.regionserver.wal.HLog: moving old hlog file 
> /hbase-89-su/.logs/hbasedev,60020,1288977933643/10.10.1.177%3A60020.1288977933829
>  whose highest sequenceid is 270054 to 
> /hbase-89-su/.oldlogs/10.10.1.177%3A60020.1288977933829
> {noformat}
> Marking as Blocker and taking a deeper look.

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