Question

hadoop读取文件程序，提示这个Exception in thread main java.lang.ClassNotFoundException:HBaseNewAPI

没有涉及Hbase的操作，HBase开启和关闭都会有这个错误。求大神给解决啊代码如下：package com.t1;import org.apache.hadoop.fs.FsUrlStreamHandlerFactory;import org.apache.hadoop.io.IOUtils;import org.apache.hadoop.fs.FsUrlStreamHandlerFactory;import org.apache.hadoop.io.IOUtils;import java.io.IOException;import java.io.InputStream;import java.net.MalformedURLException;import java.net.URL;public class t1 { static{ URL.setURLStreamHandlerFactory(new FsUrlStreamHandlerFactory()); } public static void main(String[] args) throws MalformedURLException,IOException{ InputStream in=null; try { in=new URL(args[0]).openStream(); IOUtils.copyBytes(in,System.out,4096,false); }finally { IOUtils.closeStream(in); } }}

Answer 1

Your command line to execute the said class is not correct. You are giving path with folders included. instead you shall give fully qualified class name
[root@dev MapReduce]# hadoop jar target/MapReduce-0.0.1-SNAPSHOT.jar src/main/java/com/hadoop/bi/MapReduce/MaxTemperature sample.txt /out
should be changed to
[root@dev MapReduce]# hadoop jar target/MapReduce-0.0.1-SNAPSHOT.jar com/hadoop/bi/MapReduce/MaxTemperature sample.txt /out
as per your package heirarchy.
Hope this helps.

追问

我这是直接在hdfs里面读文件，路径正确，不是路径的原因应该

Answer 2

这个错是类没找到异常, 仔细查看是不是包导错了

追问

没有导错啊，根本就没有跟这个相关的包啊。我用IntelliJ IDEA远程调用运行好好的，但是打了包之后 master节点上面运行就报这个错误

追答

好吧,,,,,,,,我从没用过你说的intellij ,,,,,,,,,,,,我不能帮到你了