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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4196) TableRecordReader may skip first row of region
Date Sat, 13 Aug 2011 22:53:27 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4196?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13084735#comment-13084735
] 

Hudson commented on HBASE-4196:
-------------------------------

Integrated in HBase-TRUNK #2113 (See [https://builds.apache.org/job/HBase-TRUNK/2113/])
    HBASE-4196 TableRecordReader may skip first row of region

stack : 
Files : 
* /hbase/trunk/CHANGES.txt
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/mapreduce/TableRecordReaderImpl.java
* /hbase/trunk/src/main/java/org/apache/hadoop/hbase/mapred/TableRecordReaderImpl.java


> 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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