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

在hadoop 環境下運行MapReduce 下wordCount出現以下錯誤： Error: Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster 根據報錯提示 找到hadoop安裝目錄下$HADOOP_HOME/etc/mapred-site.xml,增加以下代碼 <property>

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