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From "ramkrishna.s.vasudevan (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4841) If I call split fast enough, while inserting, rows disappear.
Date Wed, 23 Nov 2011 04:18:40 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13155672#comment-13155672

ramkrishna.s.vasudevan commented on HBASE-4841:

LOG.warn("Why is there a raw encodedRegionName in lastSeqWritten? name=" +
          Bytes.toString(encodedRegionName) + ", seqid=" + l);


is getting repeated in the logs. 
> If I call split fast enough, while inserting, rows disappear. 
> --------------------------------------------------------------
>                 Key: HBASE-4841
>                 URL: https://issues.apache.org/jira/browse/HBASE-4841
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Alex Newman
>            Assignee: ramkrishna.s.vasudevan
>            Priority: Critical
>         Attachments: 1, log, log2
> I'll attach a unit test for this. Basically if you call split, while inserting data you
can get to the point to where the cluster becomes unstable, or rows will  disappear. The unit
test gives you some flexibility of:
> - How many rows
> - How wide the rows are
> - The frequency of the split. 
> The default settings crash unit tests or cause the unit tests to fail on my laptop. On
my macbook air, i could actually turn down the number of total rows, and the frequency of
the splits which is surprising. I think this is because the macbook air has much better IO
than my backup acer.

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