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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13262) ResultScanner doesn't return all rows in Scan
Date Fri, 20 Mar 2015 18:09:41 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13262?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14371763#comment-14371763
] 

Andrew Purtell commented on HBASE-13262:
----------------------------------------

An extra RPC will be quite bad for performance, especially for clients like Phoenix, which
does a lot of short scans using guideposts. We should backport the NextState (or similar)
changes all the way back to 0.98 as I proposed above. I will do this if nobody else wants
to do the work. I don't see any reason the changes cannot be both backwards and forwards compatible.

> ResultScanner doesn't return all rows in Scan
> ---------------------------------------------
>
>                 Key: HBASE-13262
>                 URL: https://issues.apache.org/jira/browse/HBASE-13262
>             Project: HBase
>          Issue Type: Bug
>          Components: Client
>    Affects Versions: 2.0.0, 1.1.0
>         Environment: Single node, pseduo-distributed 1.1.0-SNAPSHOT
>            Reporter: Josh Elser
>            Assignee: Josh Elser
>            Priority: Blocker
>             Fix For: 2.0.0, 1.1.0, 0.98.13
>
>         Attachments: 13262-0.98-testpatch.txt, regionserver-logging.diff, testrun_0.98.txt,
testrun_branch1.0.txt
>
>
> Tried to write a simple Java client again 1.1.0-SNAPSHOT.
> * Write 1M rows, each row with 1 family, and 10 qualifiers (values [0-9]), for a total
of 10M cells written
> * Read back the data from the table, ensure I saw 10M cells
> Running it against {{04ac1891}} (and earlier) yesterday, I would get ~20% of the actual
rows. Running against 1.0.0, returns all 10M records as expected.
> [Code I was running|https://github.com/joshelser/hbase-hwhat/blob/master/src/main/java/hbase/HBaseTest.java]
for the curious.



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