Hadoop 文件是在HDFS中创建的，但可以'；不要写内容 我在Vmware中安装了HDFP 3.0.1 DataNode和NameNode正在运行 我将文件从Ambarui/Terminal上传到HDFS，一切正常

当我尝试写入数据时：

    Configuration conf = new Configuration();
    conf.set("fs.defaultFS", "hdfs://172.16.68.131:8020");

    FileSystem fs = FileSystem.get(conf);
    OutputStream os = fs.create(new Path("hdfs://172.16.68.131:8020/tmp/write.txt"));
    InputStream is = new BufferedInputStream(new FileInputStream("/home/vq/hadoop/test.txt"));
    IOUtils.copyBytes(is, os, conf);

    Configuration conf = new Configuration();
    conf.set("fs.defaultFS", "hdfs://172.16.68.131:8020");
    FileSystem fs = FileSystem.get(conf);
    FSDataInputStream inputStream = fs.open(new Path("hdfs://172.16.68.131:8020/tmp/ui.txt"));
    System.out.println(inputStream.available());
    byte[] bs = new byte[inputStream.available()];

日志：

它在HDFS中创建文件，但它是空的

当我读取数据时也是如此：

    Configuration conf = new Configuration();
    conf.set("fs.defaultFS", "hdfs://172.16.68.131:8020");

    FileSystem fs = FileSystem.get(conf);
    OutputStream os = fs.create(new Path("hdfs://172.16.68.131:8020/tmp/write.txt"));
    InputStream is = new BufferedInputStream(new FileInputStream("/home/vq/hadoop/test.txt"));
    IOUtils.copyBytes(is, os, conf);

    Configuration conf = new Configuration();
    conf.set("fs.defaultFS", "hdfs://172.16.68.131:8020");
    FileSystem fs = FileSystem.get(conf);
    FSDataInputStream inputStream = fs.open(new Path("hdfs://172.16.68.131:8020/tmp/ui.txt"));
    System.out.println(inputStream.available());
    byte[] bs = new byte[inputStream.available()];

I可以读取可用的字节。但无法读取文件

日志：

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我在互联网上看到了很多答案，但都没有成功。

您是否查看了以下链接：您是否查看了以下链接：