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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-1224) Scanner returns values from before startrow
Date Wed, 25 Feb 2009 21:43:02 GMT

     [ https://issues.apache.org/jira/browse/HBASE-1224?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

stack updated HBASE-1224:

    Attachment: 1224.patch

Ben digging turned up fact that HalfMapFile sets current position back to midkey when its
the top-half of a file and its first invocation of next.

Trying to reproduce in a unit test, I see this happening but higher up in HStoreFileScanner,
while the wrong answer comes up out of the HalfMapFile, HSFS keeps iterating the HalfMapFile
until it starts returning right answers.  Something more subtle is going on.  Meantime this
patch makes halfmapfile do the right thing.  Maybe it fixes Bens issue.

> Scanner returns values from before startrow
> -------------------------------------------
>                 Key: HBASE-1224
>                 URL: https://issues.apache.org/jira/browse/HBASE-1224
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: stack
>            Priority: Critical
>             Fix For: 0.19.1, 0.20.0
>         Attachments: 1224.patch
> Ben Maurer reports our returning rows from before startrow -- lots of concurrent scanners
run out of mapreduce jobs that are updating rows as they go.

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