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Date: Thu, 3 Mar 2016 13:10:18 +0000 (UTC)
From: "Anoop Sam John (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12944392.1456381117000.208236.1457010618256@Atlassian.JIRA>
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 <JIRA.12944392.1456381117627@arcas>
Subject: [jira] [Commented] (HBASE-15325) ResultScanner allowing partial
 result will miss the rest of the row if the region is moved between two rpc
 requests
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    [ https://issues.apache.org/jira/browse/HBASE-15325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15177786#comment-15177786 ] 

Anoop Sam John commented on HBASE-15325:
----------------------------------------

That is another issue?  I think it is raised recently also

Here the issue is when the scan returns partial results and then a region move happens, the new scanner created by client will put a startrow as the last fetched Result's row + 1.   So we might miss some of the cells in the current row.

> ResultScanner allowing partial result will miss the rest of the row if the region is moved between two rpc requests
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-15325
>                 URL: https://issues.apache.org/jira/browse/HBASE-15325
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 1.2.0, 1.1.3
>            Reporter: Phil Yang
>            Assignee: Phil Yang
>            Priority: Critical
>         Attachments: 15325-test.txt, HBASE-15325-v1.txt, HBASE-15325-v2.txt, HBASE-15325-v3.txt, HBASE-15325-v5.txt, HBASE-15325-v6.1.txt, HBASE-15325-v6.2.txt, HBASE-15325-v6.3.txt, HBASE-15325-v6.4.txt, HBASE-15325-v6.5.txt, HBASE-15325-v6.txt
>
>
> HBASE-11544 allow scan rpc return partial of a row to reduce memory usage for one rpc request. And client can setAllowPartial or setBatch to get several cells in a row instead of the whole row.
> However, the status of the scanner is saved on server and we need this to get the next part if there is a partial result before. If we move the region to another RS, client will get a NotServingRegionException and open a new scanner to the new RS which will be regarded as a new scan from the end of this row. So the rest cells of the row of last result will be missing.


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