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From "Haijia Zhou (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-1743) conf.get("map.input.file") returns null when using MultipleInputs in Hadoop 0.20
Date Wed, 07 Nov 2012 19:14:13 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1743?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13492604#comment-13492604
] 

Haijia Zhou commented on MAPREDUCE-1743:
----------------------------------------

Hi, I'm facing the same issue in project. I just wonder how Luo and Jim's solution can work
because TaggedInputSplit is not a public class.
Thanks
                
> conf.get("map.input.file") returns null when using MultipleInputs in Hadoop 0.20
> --------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-1743
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1743
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 0.20.2
>            Reporter: Yuanyuan Tian
>
> There is a problem in getting the input file name in the mapper when uisng MultipleInputs
in Hadoop 0.20. I need to use MultipleInputs to support different formats for my inputs to
the my MapReduce job. And inside each mapper, I also need to know the exact input file that
the mapper is processing. However, conf.get("map.input.file") returns null. Can anybody help
me solve this problem? Thanks in advance.
> public class Test extends Configured implements Tool{
> 	static class InnerMapper extends MapReduceBase implements Mapper<Writable, Writable,
NullWritable, Text>
> 	{
> 		................
> 		................
> 		public void configure(JobConf conf)
> 		{	
> 			String inputName=conf.get("map.input.file"));
> 			.......................................
> 		}
> 		
> 	}
> 	
> 	public int run(String[] arg0) throws Exception {
> 		JonConf job;
> 		job = new JobConf(Test.class);
> 		...........................................
> 		
> 		MultipleInputs.addInputPath(conf, new Path("A"), TextInputFormat.class);
> 		MultipleInputs.addInputPath(conf, new Path("B"), SequenceFileFormat.class);
> 		...........................................
> 	}
> }

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