How to list the path of files inside Hdfs directory and subdirectory?

user_3988268 0
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Could not figure out a way to list all files in directory and subdirectories.

Here is the code that I'm using which lists files in a specific directory but files if there is a subdorectory inside:

val conf = new Configuration()
val fs = FileSystem.get(new java.net.URI("hdfs://servername/"), conf)
val status = fs.listStatus(new Path("path/to/folder/"))
status.foreach { x => println(x.getPath.toString()) }

the above code lists all the files inside the directory but I need it to be recursive.

hdfs hadoop scala
1 Answers

You could go for a recursion whenever you discover a new folder:

val hdfs = FileSystem.get(new Configuration())

def listFileNames(hdfsPath: String): List[String] = {

  hdfs
    .listStatus(new Path(hdfsPath))
    .flatMap { status =>
      // If it's a file:
      if (status.isFile)
        List(hdfsPath + "/" + status.getPath.getName)
      // If it's a dir and we're in a recursive option:
      else
        listFileNames(hdfsPath + "/" + status.getPath.getName)
    }
    .toList
    .sorted
}
user_92971440
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