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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-11945) Client writes may be reordered under contention
Date Thu, 11 Sep 2014 17:26:35 GMT

    [ https://issues.apache.org/jira/browse/HBASE-11945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14130335#comment-14130335
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Lars Hofhansl commented on HBASE-11945:
---------------------------------------

Personally I did not expect that I can assume anything about the order of edits inside a batch.
That was just my personal implicit assumption though. We do not state anything about order
in the Javadocs.

> Client writes may be reordered under contention
> -----------------------------------------------
>
>                 Key: HBASE-11945
>                 URL: https://issues.apache.org/jira/browse/HBASE-11945
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 0.98.6
>            Reporter: Todd Lipcon
>            Assignee: Dima Spivak
>
> I haven't seen this bug in practice, but I was thinking about this a bit and think there
may be a correctness issue with the way that we handle client batches which contain multiple
operations which touch the same row. The client expects that these operations will be performed
in the same order they were submitted, but under contention I believe they can get arbitrarily
reordered, leading to incorrect results.



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