How to restart OAKD process in ODA X5(Oracle Database Appliance)

Existing configuration:
Server01,Server02 -ODA X5.

Server01-OAKD is in slave mode.
Server02- OAKD is in Master mode

New configuration:
Server02-OAKD is in slave mode.
Server01- OAKD is in Master mode

Login as root to server02.

[ root@server02 : Wed Apr 18, 05:43 PM : /root ]

$  oakcli show ismaster

OAKD is in Master Mode

[ root@server02 : Wed Apr 18, 05:53 PM : /root ]

$ oakcli restart oak

2018-04-18 18:03:51.467159031:[init.oak]:[Restarting the oakd..]

2018-04-18 18:03:51.638969666:[init.oak]:[Killing the running oakd with pid 18409]

2018-04-18 18:04:01.862710278:[init.oak]:[Successfully re-started the oakd..]

[ root@server02 : Wed Apr 18, 06:04 PM : /root ]

$  oakcli show ismaster

OAKD is in Slave Mode

[ root@server02 : Wed Apr 18, 06:04 PM : /root ]

$

Login as root to server01.

[ root@server01 : Wed Apr 18, 06:14 PM : /root ]

$  oakcli show ismaster

OAKD is in Master Mode