通过java api上传文件，远程主机关闭当前连接

Question

我可以通过远程服务器上的外壳程序将文件上传到HDFS，但是当我使用Java代码在PC上开发程序时，出现了一些问题。 我的电脑的操作系统是Windows10，远程服务器的操作系统是centos7

这是日志：

Exception in thread "main" java.io.IOException: 远程主机强迫关闭了一个现有的连接。
    at sun.nio.ch.SocketDispatcher.read0(Native Method)
    at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:43)
    at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
    at sun.nio.ch.IOUtil.read(IOUtil.java:197)
    at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)
    at org.apache.hadoop.net.SocketInputStream$Reader.performIO(SocketInputStream.java:57)
    at org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:142)
    at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:161)
    at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:131)
    at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:118)
    at java.io.FilterInputStream.read(FilterInputStream.java:83)
    at java.io.FilterInputStream.read(FilterInputStream.java:83)
    at org.apache.hadoop.hdfs.protocolPB.PBHelper.vintPrefixed(PBHelper.java:2280)
    at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1347)
    at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1266)
    at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:449)

这是我的代码：

  public static final String USER_KEY = "xx@XX";
    public static final String KEY_TAB_PATH = "C:\\Users\\xxx\\Desktop\\keytab";

    static Configuration conf = new Configuration();

    static {
        System.setProperty("java.security.krb5.conf", "C:\\Users\\xxx\\Desktop\\krb5.conf");
        conf.set("hadoop.security.authentication", "kerberos");
        conf.set("fs.defaultFS", "hdfs://xx.xx.xx.xxx:8020");

        try {
            UserGroupInformation.setConfiguration(conf);
            UserGroupInformation.loginUserFromKeytab(USER_KEY, KEY_TAB_PATH);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) throws Exception {
        FileSystem fs = FileSystem.get(conf);
        InputStream fis = new FileInputStream(new File("C:\\Users\\xxx\\Desktop\\a.zip"));
        OutputStream fos = fs.create(new Path("/tmp/b.exe"));
        IOUtils.copyBytes(fis,fos,1024);

    }