ORA-27300_Error

ORA-27300: OS system dependent operation:fork failed with status: 11
ORA-27301: OS failure message: Resource temporarily unavailable

Error: 
This occurs when oracle user reaches Max process limit.

Solution:
1. Edit the file /etc/security/limits.conf
2. Change the soft and hard nproc limit for oracle user.
oracle soft nproc 2047
oracle hard nproc 16384