Hadoop-Error: Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster

在hadoop 环境下运行MapReduce 下wordCount出现以下错误： Error: Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster 根据报错提示 找到hadoop安装目录下$HADOOP_HOME/etc/mapred-site.xml,增加以下代码 <property>

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