Hadoop3.2.0的mapred-site.xml配置(3.X以后的都要这么配)

**修改mapred-site.xml，配置使用yarn框架执行mapreduce处理程序，与之前版本多了后面两部**
**不配置mapreduce.application.classpath这个参数mapreduce运行时会报错：**
**Error: Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster**

<configuration>
        <property>
                <name>mapreduce.framework.name</name>
                <value>yarn</value>
        </property>
        <property>
                <name>mapreduce.application.classpath</name>
                <value>
                        /data/soft/hadoop-3.2.0/etc/hadoop,
                        /data/soft/hadoop-3.2.0/share/hadoop/common/*,
                        /data/soft/hadoop-3.2.0/share/hadoop/common/lib/*,
                        /data/soft/hadoop-3.2.0/share/hadoop/hdfs/*,
                        /data/soft/hadoop-3.2.0/share/hadoop/hdfs/lib/*,
                        /data/soft/hadoop-3.2.0/share/hadoop/mapreduce/*,
                        /data/soft/hadoop-3.2.0/share/hadoop/mapreduce/lib/*,
                        /data/soft/hadoop-3.2.0/share/hadoop/yarn/*,
                        /data/soft/hadoop-3.2.0/share/hadoop/yarn/lib/*
                </value>
        </property>

</configuration>

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