每周总结

提交到集群测试

集群上测试

（1）用maven打jar包，需要添加的打包插件依赖

<build>

    <plugins>

        <plugin>

            <artifactId>maven-compiler-plugin</artifactId>

            <version>3.6.1</version>

            <configuration>

                <source>1.8</source>

                <target>1.8</target>

            </configuration>

        </plugin>

        <plugin>

            <artifactId>maven-assembly-plugin</artifactId>

            <configuration>

                <descriptorRefs>

                    <descriptorRef>jar-with-dependencies</descriptorRef>

                </descriptorRefs>

            </configuration>

            <executions>

                <execution>

                    <id>make-assembly</id>

                    <phase>package</phase>

                    <goals>

                        <goal>single</goal>

                    </goals>

                </execution>

            </executions>

        </plugin>

    </plugins>

</build>

注意：如果工程上显示红叉。在项目上右键->maven->Reimport刷新即可。

（2）将程序打成jar包

 

（3）修改不带依赖的jar包名称为wc.jar，并拷贝该jar包到Hadoop集群的/opt/module/hadoop-3.1.3路径。

（4）启动Hadoop集群

[atguigu@hadoop102 hadoop-3.1.3]sbin/start-dfs.sh

[atguigu@hadoop103 hadoop-3.1.3]$ sbin/start-yarn.sh

（5）执行WordCount程序

[atguigu@hadoop102 hadoop-3.1.3]$ hadoop jar  wc.jar

 com.atguigu.mapreduce.wordcount.WordCountDriver /user/atguigu/input /user/atguigu/output