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This repository was archived by the owner on Apr 5, 2022. It is now read-only.
This repository was archived by the owner on Apr 5, 2022. It is now read-only.

Hadoop Spring mapreduce multiple inputs and mappers in a job #23

@honeyc0der

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@honeyc0der

How to specify multiple input files and their respective format in a Job tag?

<beans:beans xmlns="http://www.springframework.org/schema/hadoop"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/hadoop http://www.springframework.org/schema/hadoop/spring-hadoop.xsd">

<context:property-placeholder location="hadoop.properties"/>

<configuration>
fs.default.name=${hd.fs}
yarn.resourcemanager.address=${hd.rm}
mapreduce.framework.name=${mr.fw}
</configuration>

<job id="wordcountJob"
input-path="${wordcount.input.path}"
output-path="${wordcount.output.path}"
mapper="org.apache.hadoop.examples.WordCount.TokenizerMapper"
reducer="org.apache.hadoop.examples.WordCount.IntSumReducer"/>

</beans:beans>

As we can a specify in java program. Like we this.

MultipleInputs.addInputPath(job, firstPath, FirstInputFormat.class, FirstMap.class);
MultipleInputs.addInputPath(job, sencondPath, SecondInputFormat.class, SecondMap.class);

I goggled a lot even i checked its xsd file. I did not find any attribute so how can we specify multiple inputs in a job?

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