Hadoop3.1.3下成功安装后，进行MapReduce操作出现错误：错误: 找不到或无法加载主类org.apache.hadoop.mapreduce.v2.app.MRAppMaster解决办法：① 在命令行下输入如下命令，并将返回的地址复制。$ hadoop classpath/usr/local/hadoop/hadoop-3.1.3/etc/hadoop:/usr/local/hado

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 10582at com.thoughtworks.paranamer.BytecodeReadingParanamer$ClassReader.accept(BytecodeReadingParanamer.java:563)at com.thoughtwork