e2fsck gives the error /dev/mapper/vg_name-lv_name in use Cannot continue, aborting.

Issue

• Unmounting the logical volume gives the below error.

    $ umount -f /test
    umount2: Device or resource busy
    umount: /test: device is busy.
    (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1))
    umount2: Device or resource busy

• Getting the below error while running e2fsck after lazy unmount with umount -l.

    $ e2fsck  -f /dev/mapper/vg_name-lv_name
    e2fsck 1.41.12 (17-May-2010)
    /dev/mapper/vg_name-lv-name is in use.
    e2fsck: Cannot continue, aborting.