Delete hdfs folder from java
I do it this way:
Configuration conf = new Configuration();
conf.set("fs.hdfs.impl",org.apache.hadoop.hdfs.DistributedFileSystem.class.getName());
conf.set("fs.file.impl",org.apache.hadoop.fs.LocalFileSystem.class.getName());
FileSystem hdfs = FileSystem.get(URI.create("hdfs://<namenode-hostname>:<port>"), conf);
hdfs.delete("/path/to/your/file", isRecursive);
you don't need hdfs://hdfshost:port/
in your file path
This works for me.
Just add the following codes in my WordCount program will do:
import org.apache.hadoop.fs.*;
...
Configuration conf = new Configuration();
Path output = new Path("/the/folder/to/delete");
FileSystem hdfs = FileSystem.get(URI.create("hdfs://namenode:port"),conf);
// delete existing directory
if (hdfs.exists(output)) {
hdfs.delete(output, true);
}
Job job = Job.getInstance(conf, "word count");
...
You need to add hdfs://hdfshost:port
explicitly to get distributed file system. Else the code will work for local file system only.