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From "Phil Yang (JIRA)" <j...@apache.org>
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
Date Thu, 03 Mar 2016 03:20:18 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15177086#comment-15177086
] 

Phil Yang commented on HBASE-15325:
-----------------------------------

[~tedyu]
I add some logs in my last patch, some in hbase-server module and some in hbase-client module.
But I can only find logs in hbase-server and can't find any logs belongs to hbase-client.
Is it possible that the build ran the original hbase-client codes, not the patched one since
TestPartialResultsFromClientSide is in hbase-server module? Not only logs but the behavior
of client is not as expected. Thanks.

> 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.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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