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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5374) CombineFileRecordReader does not set "map.input.*" configuration parameters for first file read
Date Thu, 04 Jul 2013 13:11:50 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13700057#comment-13700057
] 

Hadoop QA commented on MAPREDUCE-5374:
--------------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12590884/MAPREDUCE-5374.patch
  against trunk revision .

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/3829//console

This message is automatically generated.
                
> CombineFileRecordReader does not set "map.input.*" configuration parameters for first
file read
> -----------------------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5374
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5374
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 1.2.0
>            Reporter: Dave Beech
>            Assignee: Dave Beech
>         Attachments: MAPREDUCE-5374.patch
>
>
> The CombineFileRecordReader operates on splits consisting of multiple files. Each time
a new record reader is initialised for a "chunk", certain parameters are supposed to be set
on the configuration object (map.input.file, map.input.start and map.input.length)
> However, the first reader is initialised in a different way to subsequent ones (i.e.
initialize is called by the MapTask directly rather than from inside the record reader class).
Because of this, these config parameters are not set properly and are returned as null when
you access them from inside a mapper. 

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