Just need to kill the defunct process and restart the rscd service.if still facing issue then restart the server,it will resolve the issue.

1) find process ID for defunct process :

bash-3.00# ps -ef|grep -i defunct

    root   594   593   0        - ?           0:00 <defunct>

bash-3.00# ptree 593

550   /usr/dt/bin/dtlogin -daemon

  579   /usr/dt/bin/dtlogin -daemon

    593   dtgreet -display : 0

      594   <defunct>

2) force a defunct process to be reaped by its parent using preap command :

bash-3.00# preap 594

594: exited with status 0

bash-3.00# ps -ef|grep -i defunct

3) check that stop/start of RSCD is not creating defunct again

bash-3.00# ./rscd stop

Stopping Remote System Call Daemon (RSCD) ...

bash-3.00# ps -ef|grep -i rscd

bash-3.00# ./rscd start

Starting Remote System Call Daemon (RSCD) ...

bash-3.00# ps -ef|grep -i defunct

bash-3.00#