Meteor: Unexpected mongo exit code 100. Restarting.Can't start mongo server

Question

I had to force reboot my mac and now get the following error when trying to start one particular meteor app on localhost.

Unexpected mongo exit code 1

Answer 1

These are the steps that solved my instance of this problem.

1. Delete .meteor/local/db/mongod.lock
2. Delete .meteor/local/db/journal/j.*(note: I only moved it just in case! ;D)
3. sudo meteor

sudo might not be necessary but it was the only way back into the app for me. Hope that saves someone a bit of time getting back up and running.