Replica Set Error Code 76

Question

In ref to mongo dba course trying to create replica set as asked shown by instructor in El Capitano (Single machine only), I get following error. I have three members:

Answer 1

Make sure you have the replSetName name configured in /etc/mongod.conf

replication:
  replSetName: "somename"

Then restart your mongod.

sudo service mongod stop
sudo service mongod start
sudo service mongod restart