“This node was not started with the replSet option”

Question

I am studying the MongoDBUniversity\'s M101P: MongoDB for Developers course.

I am using WiredTiger on MongoDB 3.2.

Answer 1

So as I finished writing this question, the answer just came to me like a lightbulb, which seems to happen often... but this time I thought I would leave the answer here for anyone else who has struggled with this, considering the somewhat lack of questions/answers on this topic on the forum.

It was a simple case of the default port being used when running my config file.
I was using mongo < init_replica.js to run my config and unify the servers to create the replica set.

By simply adding a port used by one of the valid servers, it ran correctly:

mongo --port 27020 < init_replica.js 

Woe is me for that one, but I hope this helps those also studying the course who find themselves stuck somewhere similar.

Jake