I am studying Hadoop on the book "Hadoop, the definitive guide 4th edition" by O'Really and I am having an issue in trying to create a Maven project for MRUnit testing. I just created the pom.xml file as shown in the book (just changing my hadoop version) but it does not work and Eclipse swhow me a lot of ArtifactTransferException
s.
My pom.xml looks like this:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>TestUnitCounter</groupId>
<artifactId>TestUnitCounter</artifactId>
<version>4.0</version>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<hadoop.version>2.6.0</hadoop.version>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-client</artifactId>
<version>${hadoop.version}</version>
</dependency>
<!-- Unit test artifacts -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.mrunit</groupId>
<artifactId>mrunit</artifactId>
<version>1.1.0</version>
<classifier>hadoop2</classifier>
<scope>test</scope>
</dependency>
<!-- Hadoop test artifact for running mini clusters -->
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-minicluster</artifactId>
<version>${hadoop.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<sourceDirectory>src</sourceDirectory>
<finalName>hadoop-examples</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.1</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.5</version>
<configuration>
<outputDirectory>${basedir}</outputDirectory>
</configuration>
</plugin>
</plugins>
</build>
</project>
May anybody tell me how to fix the problem and writing a correct pom.xml for this?
Thanks.
You could try the below steps:
1) Remove all your failed downloads with the below command:
Unix Platforms
find ~/.m2 -name "*.lastUpdated" -exec grep -q "Could not transfer" {} \; -print -exec rm {} \;
Windows Platform
cd %userprofile%\.m2\repository
for /r %i in (*.lastUpdated) do del %i
2) Now, right-click on your project in eclipse and choose Maven-> Update Dependencies (Select the check box Force Update of Snapshots/Releases), OK.