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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-4196) TableRecordReader may skip first row of region
Date Sat, 13 Aug 2011 05:24:28 GMT

     [ https://issues.apache.org/jira/browse/HBASE-4196?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack resolved HBASE-4196.
--------------------------

       Resolution: Fixed
    Fix Version/s: 0.90.5
     Hadoop Flags: [Reviewed]

Committed branch and trunk.  Thanks for the patch Ming (And review Ted)

> TableRecordReader may skip first row of region
> ----------------------------------------------
>
>                 Key: HBASE-4196
>                 URL: https://issues.apache.org/jira/browse/HBASE-4196
>             Project: HBase
>          Issue Type: Bug
>          Components: mapreduce
>    Affects Versions: 0.90.4
>            Reporter: Jan Lukavsky
>            Assignee: Ming Ma
>             Fix For: 0.90.5
>
>         Attachments: HBASE-4196-trunk.patch, HBASE-4196-trunk.patch, HBASE-4196-trunk.patch
>
>
> After the following scenario, the first record of region is skipped, without being sent
to Mapper:
>  - the reader is initialized with TableRecordReader.init()
>  - then nextKeyValue is called, causing call to scanner.next() - here ScannerTimeoutException
occurs
>  - the scanner is restarted by call to restart() and then *two* calls to scanner.next()
occur, causing we have lost the first row

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