HDFS文件追加

hdfs中文件可以追加写，步骤如下：

1、配置集群（hdfs-site.xml），必须配置才可以

  <property>
        <name>dfs.support.append</name>
        <value>true</value>
   </property>

 

2、API实现

String hdfs_path= "hdfs://ip:xx/file/fileuploadFileName";//文件路径
Configuration conf = new Configuration();
FileSystem fs = FileSystem.get(URI.create(hdfs_path), conf);
InputStream in = new BufferedInputStream(new FileInputStream(file));//要追加的文件流，file为文件
OutputStream out = fs.append(new Path(hdfs_path));
IOUtils.copyBytes(in, out, 4096, true);