Unable to resize logical volume using SSM (System Storage Manager) .

Issue

• Unable to resize logical volume using SSM (System Storage Manager).

# ssm resize -s +100%FREE /dev/ssm_vg/ssm_lv /dev/sdc
Traceback (most recent call last):
  File "/usr/bin/ssm", line 48, in <module>
    sys.exit(main.main())
  File "/usr/lib/python2.7/site-packages/ssmlib/main.py", line 2110, in main
    args.func(args)
  File "/usr/lib/python2.7/site-packages/ssmlib/main.py", line 1150, in resize
    ret = args.volume['fs_info'].resize()
  File "/usr/lib/python2.7/site-packages/ssmlib/main.py", line 256, in resize
    return self._get_fs_func("resize", *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/ssmlib/main.py", line 246, in _get_fs_func
    return func(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/ssmlib/main.py", line 355, in xfs_resize
    new_size = int(new_size)
TypeError: int() argument must be a string or a number, not 'NoneType'