测试Hadoop程序报错：java.lang.IllegalArgumentException: Wrong FS: hdfs://192.168.31.225:9000/user/root

古城微笑少年丶 2022-05-27 12:06 77阅读 0赞

测试PutMerge程序时，出现java.lang.IllegalArgumentException: Wrong FS: hdfs://192.168.31.225:9000/user/root,测试程序源码如下：

package com.hadoop.demo;
    
    import java.io.IOException;
    
    import org.apache.hadoop.conf.Configuration;
    import org.apache.hadoop.fs.FSDataInputStream;
    import org.apache.hadoop.fs.FSDataOutputStream;
    import org.apache.hadoop.fs.FileStatus;
    import org.apache.hadoop.fs.FileSystem;
    import org.apache.hadoop.fs.Path;
    
    public class PutMerge {
    
        public static void main(String[] args) throws IOException {
            Configuration conf = new Configuration();
            //conf.set("fs.defaultFS", "hdfs://192.168.31.225:9000");
            FileSystem hdfs = FileSystem.get(conf);
            FileSystem local = FileSystem.getLocal(conf);
    
            Path inputDir = new Path("D:/hadooptest");
            Path hdfsFile = new Path("hdfs://192.168.31.225:9000/user/root/example.txt");
    
            try{
                FileStatus[] inputFiles = local.listStatus(inputDir);
                FSDataOutputStream out = hdfs.create(hdfsFile);
    
                for(int i= 0 ; i < inputFiles.length; i++){ 
                    System.out.println(inputFiles[i].getPath().getName());
                    FSDataInputStream in = local.open(inputFiles[i].getPath());
                    byte buffer[] = new byte[256];
                    int bytesRead = 0;
                    while((bytesRead = in.read(buffer))>0){
                        out.write(buffer,0,bytesRead);
                    }
                    in.close();
                }
                out.close();
    
            }catch(Exception ex){
                ex.printStackTrace();
            }
            System.out.println("end---------->");
        }
    }

解决方案：  
1、hadoop需要把集群上的core-site.xml和hdfs-site.xml放到当前工程下。eclipse工作目录的bin文件夹下面。  
2、在代码中加入conf.set(“fs.defaultFS”, “hdfs://192.168.31.225:9000”);