[jira] [Commented] (HBASE-21206) Scan with batch size may return incomplete cells

["Zheng Hu (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-21206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16619142#comment-16619142 ] 

Zheng Hu commented on HBASE-21206:
----------------------------------

Add some comment in the new patch.v1 to explain the corner case .  As far as I know,  only when the scan.nextRaw reach the batch limit and happen to exhaust all cells of the scan,  the bug will occur... because  response's result list and moreResultsInRegion come from  two scan.nextRaw, it's a inconsistent state... Our online hbase user discovered the imcomplete cells, and we took few days to locate the bug.....

> Scan with batch size may return incomplete cells
> ------------------------------------------------
>
>                 Key: HBASE-21206
>                 URL: https://issues.apache.org/jira/browse/HBASE-21206
>             Project: HBase
>          Issue Type: Bug
>          Components: scan
>            Reporter: Zheng Hu
>            Assignee: Zheng Hu
>            Priority: Critical
>             Fix For: 3.0.0, 1.5.0, 1.3.3, 1.2.8, 2.2.0, 1.4.8, 2.1.1, 2.0.3
>
>         Attachments: HBASE-21206.v1.patch, HBASE-21206.v1.patch, ut.patch
>
>
> See the attached UT.  the table has 5 columns and each column has at least one cell in it, but when we scan the table with batchSize=3,  we only got 3 cells returned , the other 2 cells got lost ...
> It's a critial bug and should be fixed..



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