客户端去操作hdfs时，出现异常

Question

代码如下：

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;


public class HDFSClient {
    public static void main(String[] args) throws Exception {
        // 1 获取文件系统
        Configuration configuration = new Configuration();

        // 配置在集群上运行
        configuration.set("fs.defaultFS", "hdfs://hadoop102:8020");
        FileSystem fs = FileSystem.get(configuration);


        // 2 把本地文件上传到文件系统中
        fs.copyFromLocalFile(new Path("e:/xiyou.txt"), new Path("/user/xiyou.txt"));

        // 3 关闭资源
        fs.close();
        //System.out.println("over");
    }
}

错误如下：

 Exception in thread "main" java.lang.ExceptionInInitializerError
    at org.apache.hadoop.util.StringUtils.<clinit>(StringUtils.java:80)
    at org.apache.hadoop.fs.FileSystem$Cache$Key.<init>(FileSystem.java:2806)
    at org.apache.hadoop.fs.FileSystem$Cache$Key.<init>(FileSystem.java:2802)
    at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2668)
    at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:371)
    at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:170)
    at com.root.hdfs.HDFSClient.main(HDFSClient.java:15)
Caused by: java.lang.StringIndexOutOfBoundsException: begin 0, end 3, length 2
    at java.base/java.lang.String.checkBoundsBeginEnd(String.java:3319)
    at java.base/java.lang.String.substring(String.java:1874)
    at org.apache.hadoop.util.Shell.<clinit>(Shell.java:50)
    ... 7 more

Answer 1

https://issues.apache.org/jira/browse/HADOOP-14586
是不是用了java9版本，java版本降低一下试试