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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2014/11/15 07:01:33 UTC

[jira] [Commented] (HBASE-12485) Maintain SeqId monotonically increasing when Region Replica is on

    [ https://issues.apache.org/jira/browse/HBASE-12485?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14213396#comment-14213396 ] 

stack commented on HBASE-12485:
-------------------------------

Good one [~jeffreyz] (you know sequenceid is my favorite subject!)

> Maintain SeqId monotonically increasing when Region Replica is on
> -----------------------------------------------------------------
>
>                 Key: HBASE-12485
>                 URL: https://issues.apache.org/jira/browse/HBASE-12485
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Jeffrey Zhong
>            Assignee: Jeffrey Zhong
>
> We added FLUSH, REGION CLOSE events into WAL, for each those events the region SeqId is bumped. 
> The issue comes from region close operation. Because when opening a region, we use flushed SeqId from store files while after store flush during region close we still write COMMIT_FLUSH, REGION_CLOSE events etc which respectively bump up SeqId. Therefore, the region opening SeqId is lower than it should be.  



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