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Date: Fri, 25 Jun 2010 04:26:50 -0400 (EDT)
From: "Ravi Gummadi (JIRA)" <jira@apache.org>
To: mapreduce-issues@hadoop.apache.org
Subject: [jira] Updated: (MAPREDUCE-1888) Streaming overrides user given
 output key and value types.
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     [ https://issues.apache.org/jira/browse/MAPREDUCE-1888?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ravi Gummadi updated MAPREDUCE-1888:
------------------------------------

    Attachment: 1888.patch

Attaching patch fixing the issue. Added testcase that validates the user set config properties mapreduce.map.output.key.class and mapreduce.output.key.class are honored in streaming jobs with java classes as mapper and reducer.

> Streaming overrides user given output key and value types.
> ----------------------------------------------------------
>
>                 Key: MAPREDUCE-1888
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1888
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: contrib/streaming
>    Affects Versions: 0.21.0
>            Reporter: Amareshwari Sriramadasu
>            Assignee: Ravi Gummadi
>             Fix For: 0.22.0
>
>         Attachments: 1888.patch
>
>
> The following code in StreamJob.java overrides user given output key and value types.
> {code}
>     idResolver.resolve(conf.get(StreamJobConfig.MAP_OUTPUT,
>         IdentifierResolver.TEXT_ID));
>     conf.setClass(StreamJobConfig.MAP_OUTPUT_READER_CLASS,
>       idResolver.getOutputReaderClass(), OutputReader.class);
>     job.setMapOutputKeyClass(idResolver.getOutputKeyClass());
>     job.setMapOutputValueClass(idResolver.getOutputValueClass());
>     
>     idResolver.resolve(conf.get(StreamJobConfig.REDUCE_OUTPUT,
>         IdentifierResolver.TEXT_ID));
>     conf.setClass(StreamJobConfig.REDUCE_OUTPUT_READER_CLASS,
>       idResolver.getOutputReaderClass(), OutputReader.class);
>     job.setOutputKeyClass(idResolver.getOutputKeyClass());
>     job.setOutputValueClass(idResolver.getOutputValueClass());
> {code}

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