rm -rf on a directory that is not empty fails

[mkieboom]

Steps to reproduce:

Create a subfolder (works fine)
[mapr@maprdemo source1]$ mkdir subfolder1

Remove an empty subfolder using rmdir (works fine)
[mapr@maprdemo source1]$ rmdir subfolder1/

Create a subfolder (works fine)
[mapr@maprdemo source1]$ mkdir subfolder2
Add a file into the subfolder (works fine)
[mapr@maprdemo source1]$ echo "abc" >> subfolder2/abc.txt

Remove a not-empty subfolder using rm -rf (FAILS)
[mapr@maprdemo source1]$ rm -rf subfolder2/
rm: cannot remove `subfolder2': Directory not empty

[mapr@maprdemo source1]$ ls -al subfolder2/
total 2
drwxrwxr-x 2 mapr mapr 1 Sep 27 01:22 .
drwxr-xr-x 3 mapr mapr 2 Sep 27 01:22 ..
-rw-rw-r-- 1 mapr mapr 16 Sep 27 01:22 .nfs0000000018756c2300000001

Looks like the .nfs file is blocking the rm -rf to remove the directory.

[tgrall]

Related to this:
http://nfs.sourceforge.net/#faq_d2

ideally, we need to find a way to solve that without restarting the process