HADOOP2.0,Exception java.lang.NoClassDefFoundError: org/apache/hadoop/mapreduce/v2/app/MRAppMaster
一、问题运行yarn的MR程序,发现出现问题,报错:Exceptioninthread"main"java.lang.NoClassDefFoundError:org/apache/hadoop/mapreduce/v2/app/MRAppMasterCausedby:java.lang.ClassNotFoundException:org.apache.hadoop.mapreduce.v2.a