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Date: Tue, 8 Mar 2016 17:10:41 +0000 (UTC)
From: "Anoop Sam John (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12944392.1456381117000.34445.1457457041139@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=15185271#comment-15185271 ] 

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

Scan#setAllowPartialResult()  At RS side, where this flag on Scan is getting used? Am not able to see any ref. Ya it is being PBed into Scan req and set back to Scan object from PB object.  But using the state on Scan at RS side am not able to track down.

> 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
>          Components: dataloss, Scanners
>    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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