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From "Ted Yu (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 Tue, 22 Mar 2016 12:10:25 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15206242#comment-15206242

Ted Yu commented on HBASE-15325:

patch -p1 -i ~/1-hbase/15325-branch-1-v2.patch
patching file hbase-client/src/main/java/org/apache/hadoop/hbase/client/ClientScanner.java
patching file hbase-server/src/test/java/org/apache/hadoop/hbase/TestPartialResultsFromClientSide.java
Hunk #6 FAILED at 832.
1 out of 6 hunks FAILED -- saving rejects to file hbase-server/src/test/java/org/apache/hadoop/hbase/TestPartialResultsFromClientSide.java.rej

> 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
>             Fix For: 2.0.0, 1.3.0, 1.1.4, 1.4.0, 1.2.2
>         Attachments: 15325-test.txt, HBASE-15325-branch-1-v1.patch, HBASE-15325-branch-1-v2.patch,
HBASE-15325-branch-1.1-v1.patch, HBASE-15325-branch-1.3-v1.patch, HBASE-15325-branch-1.3-v2.patch,
HBASE-15325-v1.txt, HBASE-15325-v10.patch, HBASE-15325-v11.patch, 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-15325-v7.patch, HBASE-15325-v8.patch, HBASE-15325-v9.patch
> 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

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