Terminating Instance Due To Error 474/ORA-00474

Terminating Instance Due To Error 474/ORA-00474

Cause:

When user killed smon process using kill -9 <pid> you will get this error in the alert log file.

Errors in file /u01/home/oracle/product/10.2.0/db_1/admin/PROD/bdump/prod_pmon_26800.trc:
ORA-00474: SMON process terminated with error
Mon Feb 25 15:51:26 2013
PMON: terminating instance due to error 474
Instance terminated by PMON, pid = 26800