Connecting to mapR haoop cluster using PDI

Hello Friends,

i have one mapR hadoop cluster, i would like to connect and process the files present in HDFS.

when i try read some file in HDFS, i am facing the below exception.

2013/06/30 23:38:05 - FileInputList - ERROR (version 4.4.1-GA, build 18329 from 2013-04-17 12.31.49 by buildguy) : org.pentaho.di.core.exception.KettleFileException:
2013/06/30 23:38:05 - FileInputList - ERROR (version 4.4.1-GA, build 18329 from 2013-04-17 12.31.49 by buildguy) :
2013/06/30 23:38:05 - FileInputList - ERROR (version 4.4.1-GA, build 18329 from 2013-04-17 12.31.49 by buildguy) : Unable to get VFS File object for filename 'maprfs://192.168.233.128:7221/user/hello.txt' : Could not resolve file "maprfs://192.168.233.128:7221/user/hello.txt".
2013/06/30 23:38:05 - FileInputList - ERROR (version 4.4.1-GA, build 18329 from 2013-04-17 12.31.49 by buildguy) :
2013/06/30 23:38:05 - FileInputList - ERROR (version 4.4.1-GA, build 18329 from 2013-04-17 12.31.49 by buildguy) : at org.pentaho.di.core.vfs.KettleVFS.getFileObject(KettleVFS.java:161)

can someone please suggest me what might be the issue ?

Regards,
Giri