this was a fresh installation for Cell2 to join with Cell1 to make a group for high availability. So Cell2 is not is use so far.
[root@vcd5bin2 ~]# ps aux |grep vcd
root 3925 0.0 0.0 103300 848 pts/0 S+ 19:59 0:00 grep vcd
[root@vcd5bin2 ~]# rpm -e vmware-vcloud-director
Stopping vmware-vcd-watchdog: [ OK ]
Stopping vmware-vcd-cell: Unable to stop cell[FAILED]
ERROR: failed to stop services
error: %preun(vmware-vcloud-director-5.1.2-1068441.x86_64) scriptlet failed, exit status 1
[root@vcd5bin2 ~]# /etc/init.d/vmware-vcd stop
Stopping vmware-vcd-watchdog: [ OK ]
Stopping vmware-vcd-cell: Unable to stop cell [FAILED]